I've studied the laws on this, and stay with red/amber in the back, and white/amber in the front. For your own safety first, and common sense/aesthetics second.
First off, I personally think there's just no improving on the stock lamps. they blend so well on the truck, they almost disappear anyway. On my red truck, they're all but invisible. I want custom tails, but aftermarkets look particularly ricey, like they just thought we'd accept that.
Painted lamps almost always come out looking VERY cheesy, and I'm being NICE.
Chrome Ram's-Head plastic overlays are nearly as ugly, to me anyways.
If you have a BLACK truck, or just want them "murdered out" a bit, I'd suggest modding the INSIDES!
Using the "headlamp bake" methodology, pop the backs off them, and build new lamp holders using parts of the stock parts, or, put a mesh inside the back of the lens and call it a day.
Embedding LED's directly into the lens would be a cool trick too, and they'd have a custom look with minimal effort.
With my CNC, I've been considering "inlaying" a pair of red skull faces. I got a pair of red plastic goblets at Halloween that look like a compatible material. A simple black tube would be inserted through the lens, and the face put into the middle of that, recessed, so it's only seen on braking. =A LOT of work for a silly idea. -Look who's talking....
A bazillion new pics on my site, if you know where it is...