Board Thread:Theories and Speculation/@comment-35172651-20180401134411/@comment-734582-20180405154035

BigVibber wrote: Well if that is the case ur probably right. But i still think this has the potential to be a plot hole. Sure, it might be. Without knowing all the rules, we can't know for sure. But considering Obito's other feats, i think the intention was that they couldn't tell via such an easy way.

Considering Obito and Kakashi share a blood type, as well as some other similarities, they may very well have a chakra color too similar to distinguish.