as said, a slider is a technical solution but not a very practical.
HC

Color pickers are nice things to have. It should have a swatch too where one can place project-specific color chips. As for the rest, the current color setting gadget in Wings is a pretty good example of something very useful. Both RGB sliders and HSV ones at the same time. That could be a good starting point. And separate fields for base 1 (OGL) settings as well as base 256 (standard RGB)

They are right, we NEED a color picker... that other thing we are using now: it s.u.c.k.s!
It is nice if you are a real pro. artist! but we as 'Blenderers' we don't know how to get perfect colors... I can't even make darkblue with it!!!! (but that is not Blenders fault! )

Have you ever tried the HSV sliders? For some people, HSV makes more sense when mixing colors.
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-ray_theray

Recall wrote:

...I can't even make darkblue with it!!!! (but that is not Blenders fault! )....

You just start with black (total darkness - R,G,B=0) and give it a bit of blue.

As ray_theray said though, HSV silders are probably easier to understand... e.g. if you want it darker or lighter, use the V (value) slider. If you want to change the hue - e.g. make the blue more purplish or greenish - use the H (hue) slider... and to make it more like B&W (reducing or increasing the colour "saturation") use the S slider.