Since you don't have very many lumens to play with - 10fL for your screen size at the recommended mounting distance - I'd stick with white. I'd start out with a primer coat of either Kilz or Zinsser primer. After that's dry, paint with Valspar Ultra Premium Ultra White in Flat Enamel finish. :T
I hope that you're planning on moving that pj closer to the screen. 10fL is less than the recommended lumens - you'd like to have at least 12fL.
I hope that you're planning on moving that pj closer to the screen. 10fL is less than the recommended lumens - you'd like to have at least 12fL.