Hello Robert,
You can try any color that you want. If you do not want to replace that color, you can choose any. However, if you want to remove the color and put something else in the background, then green is the best. Else, any contrasting color is fine!
Whatever backdrop you choose, ensure that it is properly lit up. Yes, you need to have sufficient light on the backdrop and also on yourself so that you can separate out from the backdrop.
Just check out 3-point lighting if you have not already.
Black is good. White is good too. It all depends on how you carry it yourself.
Hope this helps!
Cheers...
