Simple but striking - thanks! I'd like to ask that you play with the proportions a bit so that the center overlap of the circles can be emphasized. Maybe by filling it in with red or another contrasting color? It's that center overlap that is the linchpin. I also love the fact that you used different sized circles. Can you also try different shapes?
Shoot - my comments got lost! Can you please try different colors combos for 169 and also some different layouts/proportions of the circles? I want to see some designs that look less corporate so would like to see other than primary colors. Thanks!