Well, okay.
Scheme 1: Official MC colors from the ice dungeon.
Scheme 2: Official MC colors from some rocks at Mt. Crenel's Base.
Scheme 3: Official MC mountain colors from Mt. Crenel.
Scheme 4: Official MC mountain colors from Veil Falls.
Scheme 5: Combination of schemes 1 and 2.
Scheme 6: Combination of schemes 2 and 3.
Location would be the upper-left corner of the map, while ingame, the actual mountain will be like Death Mountain/Mt. Crenel, and the snowy part at the top would be the same thing, but snow-covered and with ice.
But, I guess, I'll be going with version 4. It fits the mountain-theme the best, plus it's already officially colored so there's no need to edit any tiles to get them to match.