lucy24 - 5:25 pm on Feb 6, 2012 (gmt 0)

don't know what background color would be good for blue text

Hardly any, unless your target audience is under 25. Very light blue/green/lilac, maybe. Assuming you mean darkish blue text. Light on dark would get you a whole different set of answers.

You don't need to post an actual link; if you identify the color(s) you can get opinions. For comparison purposes: I realized recently that I'd managed to design something with light green text on a dark green background. But the exact shades make all the difference between painful and restful ;)