I'll get some better pics. It's on the outside edging of his "shoulders" it's almost not noticable, but it is there.
I'm on mobile, so hard for me to see anyways, lol...
But I agree with dstokely, close up pics would help, if you can, natural indirect light is best...
I had a blue roo I thought had leakage, he turned out to have some sun bleaching instead, so maybe????
Though I do know someone who has a blue with leakage........