Black spot on my baby sulcata tortoises shell

[Grant23]

My sulcata tortoise has a black spot on his shell that bothers me. I don’t know what it is and I am checking to see if he isnok

 

[Littleredfootbigredheart]

I’ve not quite seen colouring like it but I’m sure it’s nothing of concern, let me tag @Tom for you though to have a look and make sure