For a black pinto I like both gold and silver hardware. I think either one makes a black look nice. I really like the look of a colored noseband on a black horse also.
For a bay pinto I love gold hardware. I also like halters that have a gold bar across the noseband on a bay. This isnt the best picture of this halter but you can get the idea.
I only have another bay or black (he's bay) pinto, but no good shots showing him with a show halter (you can't see the halters too well in the show photos I have)
Here are some of my bay and black pintos with show halters. I personally like gold trim on chestnuts, bays, blacks and palominos. Silver trim for blacks, and grays, of course this is just my opinion. Anyway here are some pictures.
This is my black & white filly last year in her show halter - she is really hard to photograph though so excuse the bad angle and posing! lol I like purple on her