J.E.
Hello!
I recommend to definitely get this checked out, it could be a type of anemia, which can cause cyanosis (blue coloring), and would be something you need to treat if it's the case. It can be a type of anemia that can be corrected w diet or supplements or it could be more serious & then it would be helpful for you to know anyway, it is not normal. (I've worked in an ICU for over 8 years & am in nursing school myself.) Good luck & I hope it's something easily corrected!