i have a 2 year old staffy bitch beige and white, i want to breed her with a dog she has already got used to which is a black staffy.. just wondering what colour pups will i get on average?? thanks

Expect some fawns, with or without white, and brindle with or without white, which may be very dark.
It is not proven yet that there is a gene for solid black in Staffies, many are extreme dark brindle (that appear black).
If the sire has no white, then the puppies may well have less white than the mother, unless she has two genes for white spotting pattern.

"Beige" is a vague description, what is her colour listed as on her registration certificate?

Just to ask I presume you are also looking at all he relevant health tests for your bitch and ensuring the owner of the sire has also tested the dog as colour is one of many although insignificant things you should consider when you research before looking at breeding .

Sorry should have said not as significant as health and temperament in my opinion should take priority over colour.