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CMYK mode

From: Photoshop for Designers: Color

Video: CMYK mode

So here we're looking at the CMYK version of the image, or we will be in a moment. This is actually a still and RGB image, and I can tell because it tells me right there in the title area. But, I want to see how this image gets to be CMYK because your images are not going to start out as CMYK, and at what point they get converted to CMYK is very much up for debate, depending on the kind of workflow that you choose. I will be talking about that in the movie on color management. But, for now, suffice to say that this needs to get converted to CMYK, and this is how we do it.

CMYK mode

So here we're looking at the CMYK version of the image, or we will be in a moment. This is actually a still and RGB image, and I can tell because it tells me right there in the title area. But, I want to see how this image gets to be CMYK because your images are not going to start out as CMYK, and at what point they get converted to CMYK is very much up for debate, depending on the kind of workflow that you choose. I will be talking about that in the movie on color management. But, for now, suffice to say that this needs to get converted to CMYK, and this is how we do it.

It's one way we do it. There is another slightly more involved way, but for now, this is the easiest way. I am going to click OK, and you might have noticed a slight shift in colors. This is a destructive process. It's a one-way process. There is no going back on this. If we were to convert this back to RGB, we wouldn't regain anything that we had lost. But, if we now look at the channels, we have four channels as opposed to three. Because CMYK has a smaller color gamut, i .e. because there are fewer CMYK colors than there are RGB colors, your colors may look a little bit more dull than they did when you were working with RGB colors.

Because we have four channels as opposed to three, your file size will be a little bit bigger than it was. I am just going to press Ctrl or Command+Z to undo that. We go from 3.12 MB to 4.16 MB in file size. Another characteristic of CMYK images is that some of your filters will not be available for you. Some of these filters only work in RGB images.

Another characteristic of CMYK images is that when we edit them, and I'm going to apply a curves adjustment to this as I did to the RGB version in the previous movie. Here, when we move the curve up, because this is a subtractive color space, when we move the curve up, we are adding ink, and things get darker. When we move the curve down, we are removing ink, and things get lighter. Our color channels for a CMYK image are measured not on a scale of 0 to 255, but with ink percentages of 0 to 100.

If I come and mouse over the image, we can see that in the lighter areas, the values are less and in the darker areas, the values are more.

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This video is part of

Image for Photoshop for Designers: Color
Photoshop for Designers: Color

75 video lessons · 17525 viewers

Nigel French
Author

 
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  1. 1m 41s
    1. Welcome
      1m 0s
    2. Using the exercise files
      41s
  2. 25m 26s
    1. Defining color terms
      2m 38s
    2. Understanding the color wheel
      4m 3s
    3. Understanding color relationships
      1m 7s
    4. Using Kuler to understand color harmony rules and create color palettes
      4m 2s
    5. Using the Kuler web site
      3m 10s
    6. Colors on screen and on paper
      1m 42s
    7. Color as a signifier
      3m 14s
    8. Color inspirations
      2m 39s
    9. Color and accessibility
      2m 51s
  3. 38m 22s
    1. Demystifying the Color Picker
      2m 57s
    2. Understanding the role of foreground and background colors
      5m 39s
    3. Choosing colors
      6m 41s
    4. Managing swatches
      7m 40s
    5. Transparency
      9m 42s
    6. Color channels
      5m 43s
  4. 41m 4s
    1. Understanding additive and subtractive color
      2m 57s
    2. RGB mode
      1m 56s
    3. CMYK mode
      2m 41s
    4. Lab mode
      3m 49s
    5. Indexed mode
      2m 16s
    6. Grayscale mode
      5m 0s
    7. Color management
      14m 15s
    8. Color depth (8-, 16-, 24-, and 32-bit)
      4m 19s
    9. Monitor calibration
      3m 51s
  5. 26m 43s
    1. Evaluating color with the Histogram panel
      3m 18s
    2. Evaluating color with the Info panel
      1m 48s
    3. Boosting color with levels
      3m 48s
    4. Auto Tone and Auto Contrast
      7m 38s
    5. Manually setting the black and white point
      3m 50s
    6. Curves
      6m 21s
  6. 18m 30s
    1. What is color correction?
      5m 45s
    2. White balancing in Camera Raw
      1m 46s
    3. Color correction with color balance
      1m 34s
    4. Color balancing using photo filters
      1m 26s
    5. Color correction with variations
      4m 27s
    6. Color correction by the numbers
      3m 32s
  7. 33m 14s
    1. Selecting color with the Magic Wand
      4m 43s
    2. Selecting color with the Quick Selection tool
      2m 26s
    3. Selecting color with Color Range
      4m 0s
    4. Neutralizing whites with the Multiply blend mode
      2m 55s
    5. Neutralizing blacks with the Screen blend mode
      57s
    6. Masking colors with the Blend If sliders
      2m 54s
    7. Masking hair with a channel mask and removing contaminant colors
      2m 58s
    8. Shifting targeted colors using Hue/Saturation
      5m 4s
    9. Matching colors using Hue/Saturation
      3m 16s
    10. Matching colors using the Match Color command
      1m 36s
    11. Matching colors using the Color blend modes
      2m 25s
  8. 21m 8s
    1. Saturating colors
      4m 9s
    2. Desaturating colors
      1m 57s
    3. Desaturating in Camera Raw
      3m 1s
    4. Creating a color accent with selective saturation
      2m 38s
    5. Enhancing a sunrise with a gradient map
      5m 49s
    6. Increasing vibrance
      1m 19s
    7. Using selective color
      2m 15s
  9. 32m 42s
    1. Designing with spot colors
      12m 15s
    2. Adding a fifth color to a CMYK image
      5m 0s
    3. Adding spot colors to a grayscale image
      5m 24s
    4. Create a metallic print effect
      3m 8s
    5. Creating duotones, tritones, and quadtones
      6m 55s
  10. 30m 45s
    1. Creating a silkscreen print look with a limited color palette
      7m 59s
    2. Combining color with black and white
      2m 22s
    3. Creating a nostalgic travel poster using the Cut Out filter
      6m 27s
    4. Mapping an image to a color look up table (CLUT)
      7m 56s
    5. Converting to black and white
      6m 1s
  11. 48m 34s
    1. Creating a hand-tinted portrait (the easy way)
      3m 29s
    2. Creating a hand-tinted portrait (the harder way)
      11m 23s
    3. Creating an Andy Warhol look
      4m 44s
    4. Applying a gradient map
      4m 4s
    5. Sepia toning an image
      8m 41s
    6. Color tinting an image
      5m 15s
    7. Split toning an image
      2m 9s
    8. Working with line art
      8m 49s
  12. 23s
    1. Goodbye
      23s

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