Site that gives you matching shades?
 

Does anyone know of a site that will take a number of colors and give you matching shades of another color?

For instance* I currently have a green style as default. I would like to offer multiple color styles. I want to take the shades of green and have them converted to similar shades of red* blue* etc. Not a color wheel but something that actually takes 5 shades of one color and gives you 5 similar shades of another color.

Hopefully that makes sense. :)