Brown... I'm guessing it's just a resin buy or different supplier...
Contour Cases ("Chainsaw") were offered as an upcharge sale. Note, there were different interior layouts... so some some body styles are too pointy.. some are too short etc. I was told the fur lined were sold to go with premium finishes (sienna burst etc).
I used to hoard them like a cat lady.
When on the road, we used to pitch them out of hotel balconies to see how far they'd bounce. We learned the rounded bass versions bounced and protected better. I never had instrument damage from any of my antics.
NOTE: If your grey open cell foam has turned messy, water and a rag will remove the residue (no need to use solvents).