Crab was dark green and brown with bright white stripes lining it's legs. You can tell it's a young crab because it has several white bands, whereas adults have few, and the size of the crab was quite small (3/8 inch in width & about 1/2 inch in height). The shell was mostly brown but with some metallic silver spots covering it. In the third photo you can see that a small limpet is attached to the shell. This crab was found in a rocky and shallow part of the tide pool, he was actively crawling around when found.
The Blueband Hermit Crab is rather common in the tide pool area, and is easily spotted due to its contrasted black, orange, and white shell. It can be seen scuttling along various surfaces (rocks, seaweed, etc.).
Pagurus samuelis, the blueband hermit crab, is a species of hermit crab from the west coast of North America, and the most common hermit crab in California. It is a small species, with distinctive blue bands on its legs. It prefers to live in the shell of the black turban snail, and is a nocturnal scavenger of algae and carrion.