Anything bright would look fantastic on a grey, especially teamed with black. My fingers are itching to make neon green, black, and silver, but I don't have a horse it would suit. Orange and black would also be awesome or maybe even yellow!
edit; I have my bay in either purple, white and silver (like you) or hunter green, burgundy, cream and gold - though I am in the process of making him a purple, baby blue and silver one that is going to be stunning.
My buckskin is in chocolate, baby blue, cream and gold, and I'm in the process of making dusty rose and wine with a touch of gold - but I have no idea if it will suit her or not, because I've never seen the combo on any horse before.
IMO bright is eye-catching and that tends to be the aim of the game with hacking but sophisticated and a little demure would suit your horse better. That face is just stunning and you want to draw attention to it without distracting from it.
I think hunter green, mint green and silver would look fantastic on your horse. I made one a while back and gave it to a friend who has a chestnut - LOVELY. But green also looks great on greys.
Last edited by blue eyed pony; 11-18-2011 at 06:51 AM.