My first horse I bought for her colour. I was looking for a black quarter horse. I lucked out on her, as she has pretty good conformation, a great attitude, and she is my 'heart horse', although she is a grade horse. She is my forever horse.
The second horse I bought was based on his conformation and overall build, not his colour, he was a dappled grey, and although he was pretty, that is not what drew me to him. We didn't click though, and I sold him about 6 months after I bought him (he was a resale though, just went sooner then I first planned)
The horse I just bought was bought for both colour and build. I wanted a palomino, but I was open to all colours, and looked at many before I bought her, but as long as they were the size I wanted, and had good conformation for what I wanted to do with them, I would buy any colour. I ended up getting a palomino mare. She has OK conformation, she is a decent size and she has a nice disposion.
My next horse (if I get a next horse) I would mainly be looking for a solid, thick build, good conformation and a nice disposion. I will not be looking at colour as much, because I would like a nice good horse.
This is my black... Breeze, a grade quarter horse filly:
The grey I sold... 'Dimensional Wrangler' aka Wrangler quarter horse gelding:
My Palomino... 'Wrangles Kooler' aka Promise quarter horse mare: