I would like to say Neon looks bad on everybody. Lol SUPER cute idea but just ends up looking bad 3rd time you use it! Your horse is dark! GO CRAZY! Just about anything will look good on a bay- I try to stay away from blue because everybody around me uses it! But it will look good with your tack and horse. I once saw a glittery red pad! Red makes a fierce statment (though I think its over used) Only green if its an apple green or mint. Hunter maybe too dark. So heres my combo : Royal Blue, Yellow (like a banana not pastel), & SPARKLE!!!- silver not gold (as in browband, monograms, hair pieces, jewlery, the string used to properly braid your horses tail)
I found a non-toxic hair spray with glitter that I spritz on the mane and tail. Not alot but enough that it sparkles just a little in the sun- but my horse is also gray.