My idea might be to put a thin piece of wood right under the bracket, painted same color as wall. (theshabbycreekcottage.com)
There is something modern and soothing about trim painted the exact same color as the walls. (gardenhomeandparty.com)
I wonder if the hutch would not look so overpowering if the door and molding were «painted out» i.e. painted same color as the wall instead of the white trim additions... (theletteredcottage.net)