Purple on this "deadpool"

[Sump Crab]

I got this in a trade as a deadpool. I was unsure but it looks like some purple may be developing!?!??

 

[Saltyreef]

Sometimes when a mushroom is disturbed in an area it turns black/purple like the foot.
If it stays, congrats
It may go away in a few days.
I poked a baby candy crush one day and it developed a dark patch i thought was color coming in. It faded a day later