So help me, I can't remember what he used for color (this was back in the 60's), but the taxidermist I worked for had a neat trick for giving a finished look once he got the color right. He rubbed the antlers down with a stick of beeswax, just a light coat. Then he took a beef bone and "boned" the antlers thoroughly to smooth and polish them. Until he boned them, they always looked kinda dull and the color always stood out. But afterwards they looked just like antlers that had been polished in brush, like the original owner did it. Color mattered a lot less at that point.
BTW- I doubt the fact that it was beef bone mattered at all. He just stole an old soup bone from his dog, and kept on using that over the years. I bet another antler would work just as well.