Color Code

Now that ive finally gotten all 5 modules, Im facing yet another problem. Yes, this might sound a little bimbo...but im color coding my modules and i cant think of appropriate colors!!! help!

Any suggestions guys?

Im taking

1) Developmental Psychology
2) Health Psychology
3) Introduction to Social Work
4) Evaluating claims related to Health
5) Principals of Communication Management (Public Relations)

So far, the colors involved are: Yellow, purple, red, blue and green. The problem is, which color suits which module??

SIGH.