I think user selected images, colorsets and user stylesheets are awesome. But as that thread explores loading styles directly into serendipity.css, I cannot help but imagine how nice it would be to have a theme config type of "colorpicker" (or something like that) where a theme designer could provide a default value - hex and/or rgb (or rgba?!) and the user could change the value using a color picker. This could be great for background colors, link colors, hover, etc..... super easy and no user stylesheet needed.
Something like this:

Thoughts? Anyone willing to take this on?
