I feel silly when I think back on the bias I had with certain colors when I was younger. I use to be the same way about brindle and black dogs until I raised some sure enough good ones from good blood lines.
When I consider a dog out of different bloodline, superstition and past luck with color dont have jack to do with my decision making process.

I say get you a Parker cur if you want one. If it works out for you, it wont have nothing to do with its color. If it dont work for you, it still wont have nothing to do with its color. lol