My Paint Horse is almost solid white?

I see what you're saying - like "bay" is just ONE color, even though it includes black and brown. So you'd have to have the color "bay" plus 2 other colors for it to actually be considered a "tricolor". Is that kinda right? Like the horse you posted is buckskin, white, and err... kinda sorrel? Lol

^ Exactly. Every paint horse is genetically only two colours - Their base colour, be it bay, black, chestnut, palomino, buckskin - And the paint pattern that adds white.

Here's the APHA color chart if it helps anyone.... APHA.Com - Coat Colors

Yep, that's right. Bay is only one color, even though they have black points. So when you have a bay paint you have a two colored horse.

I so would mark him as a bay/white Paint then?
And thanks for all the lovely comments about his looks- I'm a sucker for blue eyed horses too, like most people
Oh, and before I completely forget about all of this, what color barrel racing tack would look good on him? Please no "girly" colors like hot pink (Even though his halter is that color and it looks good on him) since he is well built and very masculine in looks. I was thinking maybe All American or a bright(ish) shade of blue?

He's carrying Splash & Tobiano, in case you were curious about his specific patterns. The registry would consider him a Bay Tovero, although that's a pretty misleading term, since there are 3 completely different genes that can be considered overo.

Justice, my appx mare was never reg as a foal, her previous owner was going to breed her eventually,, and things were forgotten, so I did it (AQHA) and it cost me $1300 to reg her,,, plus a membership! Lol but so worth it!