Mike, I've got a blue interior in my car. I like it, but I have to say its A LOT of blue. If you're set up for a black interior already, I'd consider just doing the seats in blue. If you wanted, you could do the dash in blue too, to tie into that paint on to the lower dash. But I'd be inclined to leave the carpet, headliner, door panels and filler pieces black. I know, not exactly stock, but trust me when I say its A LOT of blue.
Here's an all blue chally interior (not mine). This one seems to have two tone blue seats, I think normally they're all the outside color (mine are).