Weird discoloration on skin my husband noticed

Ella

Basically my husband noticed two different colorations on my legs, i thought maybe it was just dirt or idk so i scrubbed and nothing came off. Im 37 weeks pregnant and its weird. Doesnt bother me tho. I did just find out im anemic but i don't think that has anything to do with it. Idk does anyone knoq what it is??