I never have used colored bags but I do know they are allowed. Our Relay allows people to decorate the bags any way they please before the relay. No two ever look alike. It makes it interesting to walk around the track and see all the different ideas. The white bags are the cheapest and that is why we use them. Teams hand in completed luminarias at bank night. Any luminaria that are bought but not decorated, we decorate with colorful sharpies. The night of the Relay we have a table where people can buy luminarias then and decorate them as they wish to put on the track. We sold about 7000 luminarias last Relay!

I don't think so, the color of the bag could be different. You can use the bags with some quote also if you want.