Yes, I suppose real tattoos aren't just two patches of colours. ^.^ But then if you add too much detail, the tattoo will prolly become the centre of focus, and usually that's not the idea of " accessories", huh? lol. The toning down of colours may work though.
You could prolly change that in a sec with photoshop, if you want.
Just take Sirius' hat and stuff Remus into it. It'll shut him up.