They're teal-colored... his eyebrow-thingies XDD *noticed them a while back* They may or may not be eyebrows though... just... war paint XDD (wasn't it you who called them that... someone did)

Okay! It's like... he shaved his brows and tattooed on teal markings (hey... women do it, why not Arrancar.... tattooed eyebrows! Renji has!) XDD

*is probably making no sense whatsoever*