Both males and females are cobalt blue. When the male has gone through his maturing molt he may be more of a brownish color. You really can't tell by color unless it's a mature male, and even then there are far better indicators (like boxing gloves).

It's a pet hole. I Have a large or XL kritter keeper full of dirt, with a webbed up section of burrow. She burrowed against the wall and made a U shaped burrow. I'm lucky if I see legs sticking out once every 6 months...and that's the way it should be.