Most “stable” color representation : RGB? HSV? CIELAB?

Question

There are several color representations in computer science : the standard RGB, but also HSV, HSL, CIE XYZ, YCC, CIELAB, CIELUV, ... It seems to me that most of the times, t

Answer 1

Our perception of the color of something is mostly determined by its hue; a colorspace such as HSV which gives a single value representing hue will work best.

The eye is a remarkable instrument though, and knowing the color of a single point is not enough. If the entire scene has a yellow or blue tint to it, the eye will compensate and your perception will be of a purer color - the orange Coke bottle will appear to be redder than it is. Likewise with darkness and brightness. If possible, you should try to compensate the image before taking the color sample.