A very handy online tool by Steve Chipman, slayeroffice.com, that will create 10 shades of the base color, located top-left, at varying degrees of opacity. The top row emulates opacity over a white background, the bottom over black. Input a base color or press the button for random color schemes. Quite helpful for figuring out beautiful color schemes. Requires a JavaScript-enabled browser. New tool created May 2004.
ColorMatchSimple but effective online color scheme tool to select a 6-color palette for your website.
A downloadable software tool to help create matching, harmonious color schemes. Other features include a Web preview, scrollbar preview, vector image preview, palette creator, and more!
About.com's Graphic Design Guide, Judy Litt, has put together a wonderful color gallery for web colors, spot colors, and process colors. You'll find so many interesting color combinations (primarily from people submitting them, and Judy encourages that). By clicking on a link with each one: for web colors you'll find the RGB and hex codes; for process colors you'll find CMYK information; and for spot colors you'll find the PMS information. Great source of inspiration for color combinations and ideas, with combinations labelled by theme (tropical, cool fall colors, corporate, etc.)
Use this incredibly helpful online color scheme tool to help select eye-stopping color schemes. Choose from monochromatic, contrast, “soft” contrast, triade, “double-contrast,” analogic colors, contradictory colors. Fantastic tool. By pix.cz.
Commercial software.
A color palette-generation program that's geared toward web designers by Dan Livingston for ClearInk. Want to see examples of color combinations that are 'industrial,' 'romantic,' 'tranquil,' 'refreshing,' 'sporty,' and more? Click on the description names and see these combinations, and then choose to make them darker, lighter, or make your own with the movement of your mouse. Really interesting and helpful chart to consider color combinations.