I don't guess there is any way to color the brass? Like aluminum can be anodized in colors.
Years ago I worked at Dresser Atlas building oil field trucks and offshore skids (was in electrical department) I was able to take my aluminum motorcycle parts to the paint shop and anodize them a goldish color..really looked good on a dirt bike..!!
That, or I could have painted the ORANGE, which was their color, they had plenty of it.
Don2