Your car is, obviously, all black with silver trim so adding another color will effectively make the parts jump out and shout "hey, look at me, I'm a caliper!!!!"

Now, that's all fine and well if that's what you're after. But to me, blacking out a car as much as you have already means you want that stealth sorta look all around. I'd either go silver with a black decal or black with a silver decal of some sort. On my own car I went semi-gloss and had a Chrysler decal made up at a local store.



Of course I could be completely off with my thoughts mentioned above, so if you like/want a brightly colored caliper, then go for it. I like the idea of a splash of red up front to balance out the splash of red that is the tail lights out back as opposed to adding another color to the mix. But that's just me.