Coloreminder is a web tool, that helps designer, webmasters... to find colors easily and inspiration.
The color variation is very useful when you need to create a web page, design with differents areas.
You can select a color into the list or enter the color you need (color picker)...
Just generate the result to get many variations, or others colors options (Invert , Greyscale, Web color, Complementary, Analogic )