http://www.flickr.com/photos/70796047@N02/8250621887/in/photostream/
I would go with red.
Blue…
Depends on what kind of ad image you want to build. Is it, “Attention K-Mart Shoppers, for the next hour, everything on aisle 4 is on a Blue-Light Special.” Or would you prefer to advertise what’s in the Red Light District? :-)
Whatever matches more of your clothing…..
Red.
Blue.