Good question! I like to know what colors people like if I am making them a quilt. If not, I wing it! LOL I have never had anyone not accept a quilt because it doesn't match.
If I am making something for my bedroom, I pretty much to stick to the colors I like.
I don't think quilts have to match per say in color, but I wouldn't give a country themed quilt, like with chickens or deer on it to somebody that likes contemporary. That would probably clash! LOL