How can I fix bleached white spots on a colourful dress?

I have a white dress with big black, fuschia and light pink flowers on it. I was at a Christmas party and someone spilt a whole glass of red wine over the bottom half of the dress. I've managed to remove most of the red wine stains but now, on some of the fuschia flowers, there are small white spots from where the bleach has accidentally dropped on it (they're noticeable!). Can someone recommend the best way to remove the spots? (Fabric dye? Fabric paint?) The dress is 98% cotton, 2% spandex.