First, not frist. Forest, not forrest. And for thieving it is steal, not steel which is a metal. Spelling and correct usage of homonyms is a pet peeve of mine.
But I think with your coloring considered, I would look at turquoises or teals, or even something in purple shade.
While his coat is interesting, it is not eye popping, so need a good contrast between color to spark him up.
With him, you can get away with more daring colors for pad, and you too. I would use that.
Horses make me a better person.