Lesson 1 : Introduction to color space


We all see color differently. Different colors mean different things to different people and there is no shortage of color experts who will disclosed their own subjective understanding of it – often with a scientific rational with its origins in the medieval world.  We don’t.We provide a contemporary understanding of color based on science of color perception. Your eyes can distinguish between 10 millions of colors. Luckily, we can represent all these colors with just three numbers, allowing us to plot them in 3D in what we call “color space”. But there are different types of color spaces.


 Activity

Explore the RGB, HSV and Lab color spaces. Move the colored ball to see color cross sections of different color spaces

RGB the color axis are Red, Green and Blue.

HSV it is Hue, Saturation and Value (Hue represents color, Saturation represents the intensity of color, Value represents brightness)

Lab it is Lightness and a and b axis (L represents lightness and a and be are arbitrary color axis)

Learn

  • Colors can be represented in very different ways in 3D color space
  • The RGB Space lets you select color by the amount of
    • Red
    • Green
    • Blue
  • The HSV Space lets you select by
    • Hue (color changes when you move in a circular fashion in HSV)
    • Saturation (color intensifies when you move towards the boundaries)
    • Value (color becomes lighter or darker when you move up or down)

Exercises

  1. Locate the reddest of the red color in RGB, HSV and Lab color space
  2. Locate white, Grey and Black in RGB, HSV and Lab color space

 

Reading

We all see color differently Wikipedia > ColorSpace



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