Weddingbee boards

So one thing I've done - and a trend I'm really digging is the 'same colorish/different dress' thing that's sweeping the bridal world.

You see, I've been in 17 weddings. 
Yes.
I'm THAT girl.  The person that everyone says inspired THAT movie.  You know the one.  Don't act like you guys aren't watching every cheesy wedding movie just like I find myself doing at odd times...

But, you would think that much wedding experience would make it easier, wouldn't you?
And it did, for a while.  But when I hit the bride brain point where all the details started coming in, no experience in the world could help.

I can't remember what I walk in or out of a room for, and so this site helps greatly with advice marks.

So.  My girls - I have 5 in the wedding, not including my daughter, and they're all wearing different brown dresses - think chocolate brown - and wearing gold shoes.  fairly simple.
I wanted one small thing to tie them all together - and I can't think of it. 

I thought shoes - but they all have different demands.
I thought jewelry but some dresses are too different from the others.
I thought a hair bit but they all have different style ideas for their hair...

Any suggestions on a tie-in?
Or am I crazy for thinking one would even be needed?

How about something for in their hair - a flower or pin??  Or, even though the dresses are different, couldn't they all wear the same bracelet??