I have some visualisation project where textual info is displayed on a colored background (that is not disputable). The background color is meant to give a mental shortcut to the value, and it could be basically any color in the 3 byte RGB space. Nevertheless the textual info needs to be easily readable against the background.
I've found some algorithms to generate contrasting colors from background color by inverting (XOR with #FF) the R, G and B bytes of the background color, some with improvements for R/G/B values near 128. Unfortunately these algorithms generate some color combinations which are (to be very, very euphemistic) more insulting to the eye than mere unergonomic .
What I need is some algorithm that produces contrasting, but eye-friendly companion foreground colors out of the values of the background color values. (I'd take ready-to-use code, too ;-)
Any idea ?