Help....what to wear?!?

I am face painting on Saturday for a memorial run, and I don't want to dress too crazy. Sooo what should I wear? I have an embroidered polo shirt, but I still want to be a little colorful...any ideas??

When I'm not sure what to wear I go w/ black slacks/skirt & a white button up shirt. If it's a memorial run you could add a flag pin in honor of vets.

I should have been more specific. It is in remembrance of an EMS paramedic who suffered from a heart attack on the job. All proceeds go towards a scholarship fund....I will post a link to the site so you get a better idea.
http://www.dannymac.org/run.html

Something Irish.. that seams to be big on the site.. maybe a bandanna or something in green on the bottom with your shirt. Weather depending..a long sleeve green shirt under your shirt. Maybe check your local stores for left over discounted St Patty's day stuff. Just an idea since the color for the run is green. hope I helped
Marle