Lime green is the color of choice here on the DIS boards. So, get yourself to a Home Depot. Go to the paint dept and look in the Disney section. You'll see Mickey head paint samples. There are a couple of lime green ones..either will do. Then you can cut them out (or soak the card in water, the color sample will slip right off) and attach the paint chip to your bags with a nice lime green ribbon. The thing to remember is this...if you wear the lime green Mickey head, be prepared to be approached by strangers. I saw a lime green Mickey head, actually several of them, on a woman's backpack while in the line for Soarin'. I went up to here, said Hi and that I was a DISer also. She looked at me like I had 8 heads and just turned away!!!
I've run into a bunch of DISers in WDW....stopped to talk for a bit sometimes, other times just waved and kept moving..depended on the circumstances.