Need your help

First of all, I love those dresses you picked. Browns do not have to be exact. Things do not have to be matchy matchy as long as if they are in the same color family. They can always go with maybe a tan color instead if you want to change it. They are boys usually they could care less I am surprised.
Second, its your wedding so they should excuse my language F off. Obviously. you have good taste if you picked those dresses for your girls. And, its not there decision your the bride and you tell them how it is they should deal even if you make them wear hot pink. Don't let this guys bring you down. You have more important things to worry about. Like how beautiful you will look.

Change the girls dresses??? are they nuts. make them wear all black then and tell them to get over it.

I say screw them the dress stays! They dont have to like it its not there wedding & you can persuade FH to leave the issue alone. I picked out 2 diff BM dresses i didnt know which to chose just 2 pics and some people like one and some the other but i chose the one i liked and FH didnt like it, but guess what....the dress i liked stayed..lol You pick out your BM dresses. Everyone is always going to have an opinion opposite of yours thats just life, but you do what makes you happy. and the way you described the colors they match, what do they want you to take a BM dress and cut it to make the guys vests and tie so they match perfectly they are being ridiculous! Relax you have a month left and it will all be okay