Another option if you want to try to paint-match is this: [Disclaimer: while I have done this, I have not actually driven the car yet, so I can't confirm how well it will hold up at this point]
Go to Auto Zone or equivalent, and buy a can of touch up paint in the color you want; if they don't have it, then go to automotivetouchup.com and buy a can of your paint color (they are a little pricey but the paint is good).
While at Auto Zone, also pick up really high heat paint, I don't remember what I got off the top of my head, but there will be some really high-temp resistant stuff there. Grab a primer. Also grab a gloss. I think I did a high heat gloss, but I'm not sure it matters.
Clean your brake calipers. Mask off whatever you need to. Spray on the high heat primer. Do a couple of light coats, then a good heavy-ish coat. Get good coverage. When that dries, spray on your paint-matched color. Again, light coats, followed by a heavy-ish final coat. Get good coverage. Lastly, when that dries, spray on your gloss. A couple light coats, followed by a heavy-ish final coat. Good coverage. On the final heavy-ish coats, don't go too heavy or you will get runs. So just be careful there. Then wait for the whole thing to dry a little, remove the masking before it's completely dry, and then wait for it to completely dry.
The thought is that the high heat primer will protect your paint-matched color (which wasn't really designed for something that gets as hot as brake calipers can). And the gloss is to keep them looking nice and discourage brake dust and dirt from sticking to them.
I have painted my rear calipers like this, though I have not driven the car yet. So I cannot as yet speak to the durability of this approach. Sounds like it should work though...
