My FG wore silver/glitter shoes with her ivory dress :) It was adorable. I think white and ivory might clash a little bit, so try to find ivory, or go silver, or other color if you want a pop!
Go to David's bridal! They had a few shoes and I'm sure they are dyeable. Or try the brand Dyeable. I just don't know if time wise it will work. Look for mom and pop shops too? Or get a pair of white shoes and cover them in little silk flowers in your colors!
I think white shoes would be fine.