I have seen the wedding dress in real life ( it’s on display at Sony Studios in LA) & it is kinda taupe ( beige & grey), but it has silvery threads running through it, (& the leaf embroidery is silver ) so that might cause the bluish tones.
I am very late to the party here, I only started watching last year, first the early seasons on Netflix and then caught up on the later seasons when Starz had a free weekend. Like several others, this is one of my favorite episodes and I've watched it several times. In fact, I watched it twice right before I started this post. And