Is there any standard to index the basic colors

I am wondering if there is 开发者_如何学Cstandard to index the basic colors like red, blue etc

Here is the information you need - right from the specification:

CSS Color Module Level 3

look in section - 4.3. Extended color keywords

Try ordering by hue (as in Hue, Saturation, Value).

You get something like this:

One problem with this approach is that you need to introduce a discontinuity somewhere if you want to have a scale with two extremes.