I love the colors, but I'd be careful about going overboard with a peacock theme - that might be kind of scary. Also, did you think about the connotation of peacocks with pride? Just wanted to make sure you'd thought about it - I don't think you'd want people thinking you did a peacock theme because you're proud and think you're better than them, or something.
Anyway, I was thinking about using those colors and I thought it would be neat to decorate using peacock feathers. My colors ended up changing, so the idea's out for me, but I still think it would look great! You can order the feathers online in bulk - they're actually pretty cheap. Just google 'peacock feathers' - I found a few sites where you can buy them. They come in several sizes - I was thinking of putting the smaller ones in some sort of vase and using them as centerpieces. You could buy a few larger ones and put them in a large container to flank the doors to your venue. I think it would be a really neat look, but you'd need a pretty modern-looking venue for it to look right.
Just an idea, but if you're really unorthodox, I think it would be cool to skip the floral bouquet and carry a bouquet of peacock feathers. It would be really pretty, unique, and much cheaper than flowers! Just a thought.
