Forum Moderators: open
Make sure that none of RR, GG, or BB have the a value near the value of white. Definately avoid values of FF in any of the RR, GG or BB positions and preferably avoid anything beginning with F (i.e. F0, F1...F9, FA, FB .... FF). And try to avoid anything that starts with a letter at all. The lower the first number in each of the three positions, the better (when on a white background).
This helps colour blind people to be able to read it more easily and covers different types of colour blindness.
Other than that, I am not too good at suggesting colours :)