Theme Tweaker lets you modify the colors in your theme with no CSS/PHP editing.
This plugin works as follows: It first identifies the strings in the
style.css file of your theme that look like colors. It them presents them to you with an option to replace them using a color-picker. The replaced colors are dynamically inserted in the header of your pages as they are generated.
This scheme worked great when I first developed it. But now, more and more themes (especially the ones that offer you a color-picker) are using the same strategy to control the appearance of your pages. They keep the color definitions in places other than the
style.css file such as their
php files, and the database. Such schemes will foil the color tweaking strategy of this plugin.