Colour tools

There are a number of really handy online colour tools coming to my notice. They all help the untrained or unreliable eye to come up with colour schemes based on complimentary and harmonious colours. And, with one exception, they all use very nifty DOM methods and valid XHTML.
Color Blend by Eric MeyerCalculates up to ten mid-points between two colours.
Color SchemerVery elegant tool providing 16 harmonious colours based on a given colour, with the ability to lighten and darken the scheme.
Color Scheme by PixyIncredibly comprehensive tool providing five different schemes (monochromatic, base+complement, etc). Pick a colour from a colour wheel and adjust the saturation, brightness and hue. Results shown in web palette colours, normal vision or adjusted to simulate eight different sorts of colour blindness.
EasyRGBBased on an RGB colour, creates 12 harmonies and complements.
ColorMatch RemixCreates three sets of three harmonious colours based on an RGB colour. Uses a fantastic cross-browser DHTML slider. Can also save and load themes.

My favourite is Colour Scheme, primarily because it’s the only tool which lets you adjust the colour saturation, but also because of the awe inspiring underlying code. Clearly using these computer-generated colour schemes will work well, but ultimately they are no substitute for the eye of an artist, as Luke Wroblewski indicates in Natural Selections: Colors Found in Nature and Interface Design.