ColorHexa – Color Encyclopedia including Information and Conversion
http://www.colorhexa.com/

ColorHexa.com is a free color tool providing information about any color. Just type any color values (view full list here) in the search field and ColorHexa will offer a detailed description and automatically convert it to its equivalent value in Hexadecimal, Binary, RGB, CMYK, HSL, HSV, CIE-Lab, Hunter-Lab, CIE-Luv, CIE-LCH, XYZ and xyY. ColorHexa will also generate matching color schemes such as complementary, split complementary, analogous, triadic, tetradic and monochromatic colors. So you will be able to know what colors best suit with the one you chose. It is also possible to blend colors together or create a gradient between them. This has been added to the tools section of Research Resources Subject Tracer™ Information Blog. This has been added to World Wide Web Reference Subject Tracer™ Information Blog.