Black and Yellow, cool especially if you have yellow in the planes paint scheme, send pictures.
Just for ideas check this site. Prop shop in No Cal who do custom finishes
http://www.americanpropeller.com/DESIGNERsamples.htm
Select the different aircraft models for some ideas, black and yellow sounds cool. You could come up with more than just tip stripes if you wanted to. G
P.S., Not sure how American Props paints props, if it is clear coated, but performance can be affected by paint ridges along trim lines, and decals can affect efficiency as well. I know the guys who race at Reno take decals off and and polish their props smooooth. So for all you guys with paint chips sand that out and repaint.