It's nostalgic to see each sorority's panhellenic delegate wearing her group's ACTUAL COLORS on her tshirt (page ten of link). There was a time when it was popular to wear greek letter shirts in any old mix of colors, such as one's school colors or the color you'd look best in, and not the true color(s) of your own sorority.
Wellll.....Gamma Phi Beta may have fudged it a bit.
Hybrid Mode
