Changes the colors of the feedback-buttons and gives you the opportunity to apply your own color.

Color is for the color of the typo, background determines the color of the background. So feel free to design your own: simply put in the hex-values of the color you like. Alternatively you may also use something like "color: red;". See http://en.wikipedia.org/wiki/Web_colors or in German http://de.wikipedia.org/wiki/Webfarben for either the name or the hex-number of the color you like.