Color tutorial: describing color

About this tutorial

Almost everything you create on a computer—interfaces, web pages, even documents headed for print—involves color somehow. The goal of this tutorial is to give you the tools to understand colors and to specify them precisely. What it won’t cover is how to use color well; that’s a far bigger and more involved subject in its own right.

If you’ve ever opened a graphics program, you’ve probably faced an overwhelming set of options just for picking a color. This tutorial walks through the ones you’ll run into most often, and along the way explains why so many competing color systems even exist in the first place. It’s meant to be read straight through on your first pass, though afterward you can jump back to any individual page using the index on the left. The systems covered are:

  • Paint colors
  • Visible light
  • HSL: hue, saturation, and lightness
  • Grayscale
  • RGB: red, green, and blue
  • CMYK: cyan, magenta, yellow, and black

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