I've tried looking in a couple of places but couldn't find anything certain, so any info would be appreciated.
Folks, you're missing the point. This has nothing to do with the color of the DRESS, only the trim. I'll call her Nancy: she was the mother of a child and wore the red ribbon along the edge of her dress. Someone else had said that this was a symbol of having already having a child. That was the case for this young lady: she had already been married and had at least one child before she married for the second time. Likewise, someone else had said that wearing a black ribbon meant that the bride was already pregnant before she was legally married. So no, I am not overthinking this and apologies to those who thought differently. I'm going to give this question another day or so to (hopefully) receive some other answers--this time, without the venom or spite, please.
Ashley-Proof, please?