Havana brown dressage saddle oiled to dark chocolate. I made my stirrup leathers to match, and when I buy a bridle/reins, they will also be dark brown to match. I ride all colors of horses. My saddle just happened to be brown, so I make/buy the rest of my tack to match. As for my saddle pads though, I tend to stick to neutral colors. Tan/Grey/Black (yes, I use a navajo saddle blanket with my dressage saddle) looks good on most horses.
Think of it not as a failure but as a success in how not to do it.
Don't look in a horses mouth for a gift.