Dunno, what's the weather like on Halloween where you live? I've seen an all velvet version that absolutely rocked, but would be too hot if you lived someplace warm like me.
Snow White is a very old story, some versions give her a sister Rose Red (who dies or is evil, depending on which one you read). It was Walt Disney who put her in yellow, which was purely a design choice, it had nothing to do with the story. I don't have anything against Disney, but I think you are talented enough to step outside the box a bit too
how about shifting the color palette entirely? deep gold, dark red, almost-black-purple?