I'm US size 28-32, depending on style, and 5'10". I was considering a navy blue pants and blazer combination with a dress shirt and bow tie, but I spotted a couple of dresses I liked online.
I'm a week shy of 41 and look like death warmed over in all white, so I'm not wearing a white dress. I'm also slightly obsessed with folklore (and maybe a touch superstitious), so I want to wear blue.
These are the pants and jacket I was considering:http://www.modcloth.com/shop/jackets/a-chic-start-pants-in-navyhttp://www.modcloth.com/shop/blazers-vests/academia-ahoy-blazer-in-navy
One of the dresses (FW liked this one best):https://www.pinupgirlclothing.com/plus-size-dresses/sailor-swing-blue-plus.html
This is the one I prefer:http://www.eshakti.com/shop/Dresses/Chelsea-dress-CL0037916
I would be wearing this over either of the dresses, because I despise my upper arms.http://www.eshakti.com/shop/Tops/Graphic-lace-front-placket-blouse-CL0037900
If it helps, I'm fair-skinned but flush easily, with greying medium brown hair (that will probably be dyed dark brown or black for the wedding) and brown eyes.