White.
But if you run 20" wheels, a grumper, and halo's, matching rock light colors are nifty.
I run both. White when you really need to see what's going on under the Jeep and red for scene lighting for when you don't want to mess with your night vision. Also, I think it looks cool but I do have angel eye halos, so there's that.
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I'm not cool enough for 20s or a Grumper though.
On my first night trip (Cane's Creek, Moab) only one rig had rock lights. It was so much easier to spot him. The rest of us all made mental notes to add them before the next trip out there. One dude had neon green halos. Green lighting didn't help much in the rocks.
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