Bays are so versatile color wise. I ride mine in royal blue currently.
I have a bay too and honestly, lots of colors look great on them. I would mostly suggest staying away from orange.
I use hunter green, navy blue, turquoise, and maroon.
Bright red looks so good on bays but they generally look good in most colours
I use white and teal on my bay. I used to have another bay and I used purple on her.
But red looks really good too or any bright color!
My favorites are white or dark blue but most colours look great!
White! But basically any color!