Colour Picker

Hey! It's the colour picker. This is one of the common files used by CSS Preview.

Press to launch:

Your colour:

Looking elsewhere

Colormixers - Sliders pick initial colour, lots of variants generated
Colour Wheel - Just point at the colour you want
Colorblender - Another slider / variant generator
ColorCombos - Integrates ColourMod, a nice HSL slider. Click on the pencil.
Wellstyled Colour Scheme Generator - Plenty of control on how the derived colours are generated.