You may go to the near eyeglasses to have a search. There must be a lot of colored contact lenses. You could choose one to match your clothing at the party. If you want to save a little money, you could go to the online store to buy one, like the amazon or ebay.
Well, it seems that you are really into such kind of weird and crazy color contacts. Actually, nowadays, there are loads and loads of them on offer both on the Internet and over the stores. Here I can recommend a website for you to choose where you can find almost everything you want. Yes, it is Alibaba, which is a successful e-commerce website, you can spot lots of weird cosmetic color contacts there. Hope you find it useful