I remember once finding a 6 inch centipede on the middle of the road, though this one was bright orange(forgot what species occurs in Ca, but I havent seen any since). It was limp, but still moving. I picked it up by the back leg to oberve it, but didn't take it inside as I would most critters.
I've seen some blue ones with bright orange heads and legs(not that this helps ID them). They look like smaller versions of yours. Found em up in Northern CA under redwood trees.
How do you feed the little ones anyway?