This gal is about 1/2 -3/4" long (carapace) and I know where a pair of them live at about 40fsw off Maui. It is unknown to the the author of the Hawaiian Inverts book.
I have not messed with the color saturation. This is the way they come. The blue is as bright as a light and it's how I can spot them. Very secretive, living in dead coral and staying deep in the holes most of the time.