According to etiquette, next to the bride's dress, followed by the mother of the bride's dress, the mother of the groom gowns.
Trendy & Modern Dresses
The following dresses are considered fashionable and red.
While black was traditionally thought of as a sign of a mother's disapproval, this old rule seems to have faded, though it's still best to ask the bride whether or not wearing black will offend her.