Over the past few years I have provided my crew with logo t shirts in an effort to look more professional. My logo colors are Kelly green and black. My current shirts are white which tend to show a ton of dirt and grime but less sweat. I've ordered a few khaki shirts but fear the summer sweat on the shirts will show up bad. Any ideas of what color shirts work the best? Maybe a happy medium on the dirt/grime and sweat scale?