Maroon, burgundy, mint green
Mine pulls off blues in lighter to medium shades but if your up for it black could look stunning
I feel bays can pull off any color well. I normally put a lot of blues on my bay. Cyan, Turquoise, baby blues are pretty.
I love red on bays. Also Burgundy, navy, and blues. But I bet your horse will look great in all of them.
Any color really. But blues look amazing!
Orange stands out so much and compliments them, it's my color, but more professional either white or red
Red, white, or light blue