Colour picker

Nice colour picker at Well Styled. [...]

Colour IQ

DHTML Color Picker

Pretty cool colour picker which you can plugin to your own projects. [...]

colour contraster

very useful accessibility tool for web developers to check if their colour combinations have a suitable monochromatic contract. [...]

Five Simple Steps to designing with colour part 3: Colour combinations

Mark Boulton delivers some tips on designing with colour. [...]

Colour palette inspiration

Colour charts

Very nifty Flash colour chart at kohai style. [...]

colr.org

Colr.org is a pretty cool little application to help you devise colour schemes. I particularly like the idea behind pointing to an image somewhere onl [...]

nifty colour mixer

for working out possible colour combinations. [...]

Colour Tracks

Colour Wheel

Color Wheel by Mike HudsonA different take on colour wheel. [...]

Spanish Castle Magic

This colour illusion is pretty cool. [...]