Thanks for the suggestions! I'll be doing the beadwork on a loom and it will only be 2-3 inches in height. Some images in the design are trees, and a river. I was thinking of trying to use a crescent moon as Phyllis suggested. That fits well with the other images.
The overall background will be a light eggshell. If I make a black border around the "moon" and use a pearlized light gray for the crescent, I think it will stand out and be recognizable, but a discreet tribute to his favorite band.
I'll have to use the 11/0 I already have, so not too many rows on the loom