Bike numbers/number plate color ?

I plan on running several of the National Enduros this year and will be in the Super Senior B class. I didn't see in the rules anything about number/number plate background color etc... Anybody know the rule/s here ?

Thanks

Steve

NEPG will supply you with a number to put on at each event. It's a large, oval-shaped decal that will be placed on your front number plate/headlight shell.

Thanks magoomba - I have been racing Cross Country races and your number plate color/number corresponds with your class - Anyway thanks

Steve