The mathematical representation of a color. a) Regardless of the colour space used, RGB, YIQ, YUV, a colour will appear the same on the screen. What is different is how the colour is represented in the colour space.

In the HLS colour space, colours are represented based on a three-dimensional polar coordinate system where as in the RGB colour space, colours are represented by a Cartesian coordinate system. b) Many ways have been devised to organise all of a system’s possible colors. Many of these methods have two things in common: a colour is specified in terms of three numbers, and by using the numbers as axes in a 3D space of some sort, a colour solid can be defined to represent the system. Two spaces are popular for computer graphics: RGB and HSV.