I love the idea of red accessories. Maybe red gloves and a white hat?
Vintage 1960's Ladies White Open Pillbox Hat with Veil - eBay (item 110409470300 end time Jul-09-09 22:35:00 PDT)
Ladies Vintage White Feathers Blue Bow Tilt Hat! 40's - eBay (item 250457321236 end time Jul-09-09 19:00:39 PDT)
or black maybe?
Vintage 40's Felt Flowers Tilt Hat - eBay (item 220449034432 end time Jul-14-09 17:43:38 PDT)
Definitely punch up the outfit with some color and wear red gloves. Happy Birthday!