Hi, JC. I can't tell you a way to change the color of your bricks but I can give you some direction on painting them. If you will search the board by going to "edit" then "find in top window" and searching for words like brick, painting and stripping, you will find many post about the problems with painting brick and the problems that painted brick can cause. Rather than repeat what is already here, I would ask to to review this before you think about painting your brick.
For what it's worth, the easiest way to disguise your brick might be with a light colored mantle or surround.