My engagement ring is a black diamond and I am leaning towards red and black as our colors. I'm letting the girls choose their dresses based off the color scheme because one my maiden of honor is my daughter and she's 5'9", same height as me, and then one by is 4'11" and 5'5" so I didn't really think that the same length would look right. And then my mom and step mom also have height differences, but question is, if I want mob and bms in black with red sashes would it be also tacky for both moms to be in the black with red too?