mix match, put the maid on honor in a long dress that matches the other ones, just longer make it for example, purple with a green sash, and the next with the opsite. green with purple sash, and so on. good luck, hope i helped. and maybe, do the hair similar, but like, the one with green dress gets hair down, and other gets hair up, i think that would be really cute, and its a way to get everyone something they like or look good in, like if there hair isn't long enought o do what you want with it.
(lol, i think i might do this!)