: is the font color.
: is the backgroundColor.
The css style declarations are
color: ;
background-color: ;
This color picker is designed to visually hilight the contrast between the font 'color' and 'background color'.
The color picker consists of two dynamically coordinated select options lists. If you pick a font 'color' then the font 'color' in the background options will change. If you pick background color then background color will change in the 'color' options. Trying it out, you will soon see how easy it is to pick pleasing color contrasts.
The top right 'Load a color palette' gives you 4 radio options which will load these options into the select lists on the right