Queen Aggravain in "Once Upon a Mattress." <3  Costume designed by Bob Mackie, no less!

Actress Carol Burnett appears as Queen Aggravain in ABC's "Once Upon A Mattress"

once upon a mattress costumes - Google Search

Site has tons of beautiful, inspirational pieces to look at. This is sort of what I imagine for Rachel's dress, except the sleeves aren't that big and it would all be just that shade of red/orange.