Butane for jet lighters

So, I finally picked up one of those cool little gadgets, and I was wondering what kind of fuel it takes (I'm assuming butane?) and where I can find some around Chicago? Ideally, I'd love to find ones that offer colored flames, maybe red or green or something like that.

Just grab some basic lighter fluid—you can pick it up at a gas station for a couple of bucks. Honestly, the color of the canister doesn't mean anything regarding the gas itself; it’s just branding for the lighter.