I sell some 1/32 and 1 6/4 ounce round head jigs to trout fishermen. The 2 main ones are as follows.
Nickle plated head with white goat hair and a little silver flash.
Dark colored heads, black or dark brown, with brown and or black hair on them.
Some guys like larger size heads with black bear hair on them for small-mouths in the river locally. I get request for the larger dark heads with black rabbit strips that look like zonkers for bass also.