How To Change Color To Rgb In Photoshop

Photoshop User Guide
Introduction to Photoshop
1. Dream it. Make it.
2. What's new in Photoshop
3. Edit your first photo
4. Create documents
5. Photoshop | Common Questions
6. Photoshop system requirements
7. Migrate presets, actions, and settings
8. Get to know Photoshop
Photoshop and Adobe services
1. Photoshop and Adobe Stock
2. Creative Cloud Libraries
3. Creative Cloud Libraries in Photoshop
4. Grid and guides
5. Creating actions
6. Undo and history
7. Default keyboard shortcuts
8. Touch capabilities and customizable workspaces
9. Use the Touch Bar with Photoshop
10. Use the Capture in-app extension in Photoshop
Photoshop on the iPad
1. Photoshop on the iPad | Common questions
2. Get to know the workspace
3. System requirements | Photoshop on the iPad
4. Create, open, and export cloud documents
5. Add photos
6. Work with layers
7. Draw and paint with brushes
8. Make selections and add masks
9. Retouch your composites
10. Work with adjustment layers
11. Adjust the tonality of your composite with Curves
12. Apply transform operations
13. Crop and rotate your composites
14. Rotate, pan, zoom, and reset the canvas
15. Work with Type layers
16. Work with Photoshop and Lightroom
17. Get missing fonts in Photoshop on the iPad
18. Japanese Text in Photoshop on the iPad
19. Manage app settings
20. Touch shortcuts and gestures
21. Keyboard shortcuts
22. System requirements 1.x | Photoshop on the iPad
23. System requirements 2.x | Photoshop on the iPad
24. Edit your image size
25. Livestream as you create in Photoshop on the iPad
26. Correct imperfections with the Healing Brush
27. Create brushes in Capture and use them in Photoshop
Photoshop on the web beta
1. Common questions | Photoshop on the web beta
2. Introduction to the workspace
3. System requirements | Photoshop on the web beta
4. Keyboard shortcuts | Photoshop on the web beta
5. Supported file types | Photoshop on the web beta
6. Open and work with cloud documents
7. Collaborate with stakeholders
8. Apply limited edits to your cloud documents
Cloud documents
1. Photoshop cloud documents | Common questions
2. Photoshop cloud documents | Workflow questions
3. Manage and work with cloud documents in Photoshop
4. Upgrade cloud storage for Photoshop
5. Unable to create or save a cloud document
6. Solve Photoshop cloud document errors
7. Collect cloud document sync logs
8. Share access and edit your cloud documents
Workspace
1. Workspace basics
2. Create documents
3. Use the Touch Bar with Photoshop
4. Microsoft Dial support in Photoshop
5. Tool galleries
6. Performance preferences
7. Use tools
8. Touch gestures
9. Touch capabilities and customizable workspaces
10. Technology previews
11. Metadata and notes
12. Quickly share your creations
13. Place Photoshop images in other applications
14. Preferences
15. Default keyboard shortcuts
16. Rulers
17. Show or hide non-printing Extras
18. Specify columns for an image
19. Undo and history
20. Panels and menus
21. Place files
22. Position elements with snapping
23. Position with the Ruler tool
24. Presets
25. Customize keyboard shortcuts
26. Grid and guides
Web, screen, and app design
1. Photoshop for design
2. Artboards
3. Export files in Photoshop
4. Device Preview
5. Copy CSS from layers
6. Slice web pages
7. HTML options for slices
8. Modify slice layout
9. Work with web graphics
10. Create web photo galleries
Image and color basics
1. How to resize images
2. Work with raster and vector images
3. Image size and resolution
4. Acquire images from cameras and scanners
5. Create, open, and import images
6. View images
7. Invalid JPEG Marker error | Opening images
8. Viewing multiple images
9. Customize color pickers and swatches
10. High dynamic range images
11. Match colors in your image
12. Convert between color modes
13. Color modes
14. Erase parts of an image
15. Blending modes
16. Choose colors
17. Customize indexed color tables
18. Image information
19. Distort filters are unavailable
20. About color
21. Color and monochrome adjustments using channels
22. Choose colors in the Color and Swatches panels
23. Sample
24. Color mode or Image mode
25. Color cast
26. Add a conditional mode change to an action
27. Add swatches from HTML CSS and SVG
28. Bit depth and preferences
Layers
1. Layer basics
2. Nondestructive editing
3. Create and manage layers and groups
4. Select, group, and link layers
5. Place images into frames
6. Layer opacity and blending
7. Mask layers
8. Apply Smart Filters
9. Layer comps
10. Move, stack, and lock layers
11. Mask layers with vector masks
12. Manage layers and groups
13. Layer effects and styles
14. Edit layer masks
15. Extract assets
16. Reveal layers with clipping masks
17. Generate image assets from layers
18. Work with Smart Objects
19. Blending modes
20. Combine multiple images into a group portrait
21. Combine images with Auto-Blend Layers
22. Align and distribute layers
23. Copy CSS from layers
24. Load selections from a layer or layer mask's boundaries
25. Knockout to reveal content from other layers
26. Layer
27. Flattening
28. Composite
29. Background
Selections
1. Select and Mask workspace
2. Make quick selections
3. Get started with selections
4. Select with the marquee tools
5. Select with the lasso tools
6. Select a color range in an image
7. Adjust pixel selections
8. Convert between paths and selection borders
9. Channel basics
10. Move, copy, and delete selected pixels
11. Create a temporary quick mask
12. Save selections and alpha channel masks
13. Select the image areas in focus
14. Duplicate, split, and merge channels
15. Channel calculations
16. Selection
17. Bounding box
Image adjustments
1. Perspective warp
2. Reduce camera shake blurring
3. Healing brush examples
4. Export color lookup tables
5. Adjust image sharpness and blur
6. Understand color adjustments
7. Apply a Brightness/Contrast adjustment
8. Adjust shadow and highlight detail
9. Levels adjustment
10. Adjust hue and saturation
11. Adjust vibrance
12. Adjust color saturation in image areas
13. Make quick tonal adjustments
14. Apply special color effects to images
15. Enhance your image with color balance adjustments
16. High dynamic range images
17. View histograms and pixel values
18. Match colors in your image
19. How to crop and straighten photos
20. Convert a color image to black and white
21. Adjustment and fill layers
22. Curves adjustment
23. Blending modes
24. Target images for press
25. Adjust color and tone with Levels and Curves eyedroppers
26. Adjust HDR exposure and toning
27. Filter
28. Blur
29. Dodge or burn image areas
30. Make selective color adjustments
31. Replace object colors
Adobe Camera Raw
1. Camera Raw system requirements
2. What's new in Camera Raw
3. Introduction to Camera Raw
4. Create panoramas
5. Supported lenses
6. Vignette, grain, and dehaze effects in Camera Raw
7. Default keyboard shortcuts
8. Automatic perspective correction in Camera Raw
9. How to make non-destructive edits in Camera Raw
10. Radial Filter in Camera Raw
11. Manage Camera Raw settings
12. Open, process, and save images in Camera Raw
13. Repair images with the Enhanced Spot Removal tool in Camera Raw
14. Rotate, crop, and adjust images
15. Adjust color rendering in Camera Raw
16. Feature summary | Adobe Camera Raw | 2018 releases
17. New features summary
18. Process versions in Camera Raw
19. Make local adjustments in Camera Raw
Image repair and restoration
1. Remove objects from your photos with Content-Aware Fill
2. Content-Aware Patch and Move
3. Retouch and repair photos
4. Correct image distortion and noise
5. Basic troubleshooting steps to fix most issues
Image transformations
1. Transform objects
2. Adjust crop, rotation, and canvas size
3. How to crop and straighten photos
4. Create and edit panoramic images
5. Warp images, shapes, and paths
6. Vanishing Point
7. Use the Liquify filter
8. Content-aware scaling
9. Transform images, shapes, and paths
10. Warp
11. Transform
12. Panorama
Drawing and painting
1. Paint symmetrical patterns
2. Draw rectangles and modify stroke options
3. About drawing
4. Draw and edit shapes
5. Painting tools
6. Create and modify brushes
7. Blending modes
8. Add color to paths
9. Edit paths
10. Paint with the Mixer Brush
11. Brush presets
12. Gradients
13. Fill and stroke selections, layers, and paths
14. Draw with the Pen tools
15. Create patterns
16. Generate a pattern using the Pattern Maker
17. Manage paths
18. Manage pattern libraries and presets
19. Draw or paint with a graphics tablet
20. Create textured brushes
21. Add dynamic elements to brushes
22. Gradient
23. Paint stylized strokes with the Art History Brush
24. Paint with a pattern
25. Sync presets on multiple devices
Text
1. Work with OpenType SVG fonts
2. Format characters
3. Format paragraphs
4. How to create type effects
5. Edit text
6. Line and character spacing
7. Arabic and Hebrew type
8. Fonts
9. Troubleshoot fonts
10. Asian type
11. Create type
12. Text Engine error using Type tool in Photoshop | Windows 8
13. World-Ready composer for Asian Scripts
14. How to add and edit text in Photoshop
Video and animation
1. Video editing in Photoshop
2. Edit video and animation layers
3. Video and animation overview
4. Preview video and animations
5. Paint frames in video layers
6. Import video files and image sequences
7. Create frame animations
8. Creative Cloud 3D Animation (Preview)
9. Create timeline animations
10. Create images for video
Filters and effects
1. Use the Liquify filter
2. Use the Blur Gallery
3. Filter basics
4. Filter effects reference
5. Add Lighting Effects
6. Use the Adaptive Wide Angle filter
7. Use the Oil Paint filter
8. Layer effects and styles
9. Apply specific filters
10. Smudge image areas
Saving and exporting
1. Save files in graphics formats
2. Save your files in Photoshop
3. File formats
4. Save and export video and animations
5. Save PDF files
6. Digimarc copyright protection
Printing
1. Print 3D objects
2. Print from Photoshop
3. Print with color management
4. Contact Sheets and PDF Presentations
5. Print photos in a picture package layout
6. Print spot colors
7. Duotones
8. Print images to a commercial printing press
9. Improve color prints from Photoshop
10. Troubleshoot printing problems | Photoshop
Automation
1. Creating actions
2. Create data-driven graphics
3. Scripting
4. Process a batch of files
5. Play and manage actions
6. Add conditional actions
7. About actions and the Actions panel
8. Record tools in actions
9. Add a conditional mode change to an action
10. Photoshop UI toolkit for plug-ins and scripts
3D and technical imaging
1. Creative Cloud 3D Animation (Preview)
2. Print 3D objects
3. 3D painting
4. 3D panel enhancements | Photoshop
5. Essential 3D concepts and tools
6. 3D rendering and saving
7. Create 3D objects and animations
8. Image stacks
9. 3D workflow
10. Measurement
11. DICOM files
12. Photoshop and MATLAB
13. Count objects in an image
14. Combine and convert 3D objects
15. 3D texture editing
16. Adjust HDR exposure and toning
17. 3D panel settings
Color Management
1. Understanding color management
2. Keeping colors consistent
3. Color settings
4. Work with color profiles
5. Color-managing documents for online viewing
6. Color-managing documents when printing
7. Color-managing imported images
8. Proofing colors

In Photoshop you can easily create an image in one color mode and convert it to another, perhaps to get it ready for a specific print job.

Convert an image to another color mode

You can change an image from its original mode (source mode) to a different mode (target mode). When you choose a different color mode for an image, you permanently change the color values in the image. For example, when you convert an RGB image to CMYK mode, RGB color values outside the CMYK gamut (defined by the CMYK working space setting in the Color Settings dialog box) are adjusted to fall within gamut. As a result, some image data may be lost and can't be recovered if you convert the image from CMYK back to RGB.

Before converting images, it's best to do the following:

Do as much editing as possible in the original image mode (usually RGB for images from most scanners or digital cameras, or CMYK for images from traditional drum scanners or imported from a Scitex system).
Save a backup copy before converting. Be sure to save a copy of your image that includes all layers so that you can edit the original version of the image after the conversion.
Flatten the file before converting it. The interaction of colors between layer blending modes changes when the mode changes.

In most cases, you'll want to flatten a file before converting it. However, it isn't required and, in some cases, it isn't desirable (for example, when the file has vector text layers).

Choose Image > Mode and the mode you want from the submenu. Modes not available for the active image appear dimmed in the menu.

Images are flattened when converted to Multichannel, Bitmap, or Indexed Color mode, because these modes do not support layers.

Convert an image to Bitmap mode

Converting an image to Bitmap mode reduces the image to two colors, greatly simplifying the color information in the image and reducing its file size.

When converting a color image to Bitmap mode, first convert it to Grayscale mode. This removes the hue and saturation information from the pixels and leaves just the brightness values. However, because only a few editing options are available for Bitmap mode images, it's usually best to edit the image in Grayscale mode and then convert it to Bitmap mode.

Images in Bitmap mode are 1 bit per channel. You must convert a 16‑ or 32‑bits-per-channel image to 8‑bit Grayscale mode before converting it to Bitmap mode.

If the image is in color, choose Image > Mode > Grayscale. Then choose Image > Mode > Bitmap.
If the image is grayscale, choose Image > Mode > Bitmap.

For Output, enter a value for the output resolution of the Bitmap mode image, and choose a unit of measurement. By default, the current image resolution appears as both the input and the output resolutions.

Choose one of the following bitmap conversion methods from the Use pop-up menu:

50% Threshold

Converts pixels with gray values above the middle gray level (128) to white and pixels with gray values below that level to black. The result is a very high-contrast, black-and-white representation of the image.

Pattern Dither

Converts an image by organizing the gray levels into geometric configurations of black and white dots.

Diffusion Dither

Converts an image by using an error-diffusion process, starting at the pixel in the upper-left corner of the image. If the pixel's value is above middle gray (128), the pixel is changed to white—if below it, to black. Because the original pixel is rarely pure white or pure black, error is inevitably introduced. This error is transferred to surrounding pixels and diffused throughout the image, resulting in a grainy, film-like texture.

Halftone Screen

Simulates the appearance of halftone dots in the converted image. Enter values in the Halftone Screen dialog box:

For Frequency, enter a value for the screen frequency, and choose a unit of measurement. Values can range from 1.000 to 999.999 for lines per inch and from 0.400 to 400.00 for lines per centimeter. You can enter decimal values. The screen frequency specifies the ruling of the halftone screen in lines per inch (lpi). The frequency depends on the paper stock and type of press used for printing. Newspapers commonly use an 85‑line screen. Magazines use higher resolution screens, such as 133‑lpi and 150‑lpi. Check with your print shop for correct screen frequencies.
Enter a value for the screen angle in degrees from ‑180 to +180. The screen angle refers to the orientation of the screen. Continuous-tone and black-and-white halftone screens commonly use a 45° angle.
For Shape, choose the dot shape you want.

The halftone screen becomes part of the image. If you print the image on a halftone printer, the printer will use its own halftone screen as well as the halftone screen that is part of the image. On some printers, the result is a moiré pattern.

Custom Pattern

Simulates the appearance of a custom halftone screen in the converted image. Choose a pattern that lends itself to thickness variations, typically one with a variety of gray shades.

To use this option, you first define a pattern and then screen the grayscale image to apply the texture. To cover the entire image, the pattern must be as large as the image. Otherwise, the pattern is tiled. Photoshop comes with several self-tiling patterns that can be used as halftone screen patterns.

To prepare a black-and-white pattern for conversion, first convert the image to grayscale and then apply the Blur More filter several times. This blurring technique creates thick lines tapering from dark gray to white.

Photoshop convert image to bitmap mode — Original grayscale image, and 50% Threshold conversion method

Photoshop Pattern Dither conversion method — Pattern Dither conversion method, and Diffusion Dither conversion method

Convert a color photo to Grayscale mode

Open the photo you want to convert to black-and-white.

Choose Image > Mode > Grayscale.

Click Discard. Photoshop converts the colors in the image to black, white, and shades of gray.

The technique above minimizes file size but discards color information and can convert adjacent colors to the exact same shade of gray. Using a Black & White adjustment layer increases file size but retains color information, letting you map colors to shades of gray.

Convert a Bitmap mode image to Grayscale mode

You can convert a Bitmap mode image to Grayscale mode in order to edit it. Keep in mind that a Bitmap mode image edited in Grayscale mode may not look the same when you convert it back to Bitmap mode. For example, suppose a pixel that is black in Bitmap mode is edited to a shade of gray in Grayscale mode. When the image is converted back to Bitmap mode, that pixel is rendered as white if its gray value is above the middle gray value of 128.

Choose Image > Mode > Grayscale.

Enter a value between 1 and 16 for the size ratio.

The size ratio is the factor for scaling down the image. For example, to reduce a grayscale image by 50%, enter 2 for the size ratio. If you enter a number greater than 1, the program averages multiple pixels in the Bitmap mode image to produce a single pixel in the grayscale image. This process lets you generate multiple shades of gray from an image scanned on a 1‑bit scanner.

Convert a grayscale or RGB image to indexed color

Converting to indexed color reduces the number of colors in the image to at most 256—the standard number of colors supported by the GIF and PNG‑8 formats and many multimedia applications. This conversion reduces file size by deleting color information from the image.

To convert to indexed color, you must start with an image that is 8 bits per channel and in either Grayscale or RGB mode.

Choose Image > Mode > Indexed Color.

All visible layers will be flattened; any hidden layers will be discarded.

For grayscale images, the conversion happens automatically. For RGB images, the Indexed Color dialog box appears.

Select Preview in the Indexed Color dialog box to display a preview of the changes.

Specify conversion options.

Conversion options for indexed-color images

When converting an RGB image to indexed color, you can specify a number of conversion options in the Indexed Color dialog box.

Palette Type

A number of palette types are available for converting an image to indexed color. For the Perceptual, Selective, and Adaptive options, you can choose using a local palette based on the current image's colors. These are the available palette types:

Exact

Creates a palette using the exact colors appearing in the RGB image—an option available only if the image uses 256 or fewer colors. Because the image's palette contains all colors in the image, there is no dithering.

System (Mac OS)

Uses the Mac OS default 8‑bit palette, which is based on a uniform sampling of RGB colors.

System (Windows)

Uses the Windows system's default 8‑bit palette, which is based on a uniform sampling of RGB colors.

Web

Uses the 216-color palette that web browsers, regardless of platform, use to display images on a monitor limited to 256 colors. This palette is a subset of the Mac OS 8‑bit palette. Use this option to avoid browser dither when viewing images on a monitor display limited to 256 colors.

Uniform

Creates a palette by uniformly sampling colors from the RGB color cube. For example, if Photoshop takes six evenly-spaced color levels each of red, green, and blue, the combination produces a uniform palette of 216 colors (6 cubed = 6 x 6 x 6 = 216). The total number of colors displayed in an image corresponds to the nearest perfect cube (8, 27, 64, 125, or 216) that is less than the value in the Colors text box.

Local (Perceptual)

Creates a custom palette by giving priority to colors for which the human eye has greater sensitivity.

Local (Selective)

Creates a color table similar to the Perceptual color table, but favoring broad areas of color and the preservation of web colors. This option usually produces images with the greatest color integrity.

Local (Adaptive)

Creates a palette by sampling the colors from the spectrum appearing most commonly in the image. For example, an RGB image with only the colors green and blue produces a palette made primarily of greens and blues. Most images concentrate colors in particular areas of the spectrum. To control a palette more precisely, first select a part of the image containing the colors you want to emphasize. Photoshop weights the conversion toward these colors.

Master (Perceptual)

Creates a custom palette by giving priority to colors for which the human eye has greater sensitivity. Applies when you have multiple documents open; takes all open documents into account.

Master (Selective)

Master (Adaptive)

Custom

Creates a custom palette using the Color Table dialog box. Either edit the color table and save it for later use or click Load to load a previously created color table. This option also displays the current Adaptive palette, which is useful for previewing the colors most often used in the image.

Uses the custom palette from the previous conversion, making it easy to convert several images with the same custom palette.

Number Of Colors

For the Uniform, Perceptual, Selective, or Adaptive palette, you can specify the exact number of colors to be displayed (up to 256) by entering a value for Colors. The Colors text box controls only how the indexed color table is created. Adobe Photoshop still treats the image as an 8‑bit, 256‑color image.

Color Inclusion And Transparency

To specify colors to be included in the indexed color table or to specify transparency in the image, choose from the following options:

Forced

Provides options to force the inclusion of certain colors in the color table. Black And White adds a pure black and a pure white to the color table; Primaries adds red, green, blue, cyan, magenta, yellow, black, and white; Web adds the 216 web‑safe colors; and Custom lets you define custom colors to add.

Transparency

Specifies whether to preserve transparent areas of the image during conversion. Selecting this option adds a special index entry in the color table for transparent colors. Deselecting this option fills transparent areas with the matte color, or with white if no matte color is chosen.

Matte

Specifies the background color used to fill anti-aliased edges that lie adjacent to transparent areas of the image. When Transparency is selected, the matte is applied to edge areas to help blend the edges with a web background of the same color. When Transparency is deselected, the matte is applied to transparent areas. Choosing None for the matte creates hard-edged transparency if Transparency is selected; otherwise, all transparent areas are filled with 100% white. The image must have transparency for the Matte options to be available.

Dithering

Unless you're using the Exact color table option, the color table may not contain all the colors used in the image. To simulate colors not in the color table, you can dither the colors. Dithering mixes the pixels of the available colors to simulate the missing colors. Choose a dither option from the menu, and enter a percentage value for the dither amount. A higher amount dithers more colors but may increase file size. You can choose from the following dither options:

None

Does not dither colors but instead uses the color closest to the missing color. This tends to result in sharp transitions between shades of color in the image, creating a posterized effect.

Diffusion

Uses an error-diffusion method that produces a less-structured dither than the Pattern option. To protect colors in the image that contain entries in the color table from being dithered, select Preserve Exact Colors. This is useful for preserving fine lines and text for web images.

Pattern

Uses a halftone-like square pattern to simulate any colors not in the color table.

Noise

Helps to reduce seam patterns along the edges of image slices. Choose this option if you plan to slice the image for placement in an HTML table.