Board Thread:Theories and Speculation/@comment-995176-20141108204910/@comment-3568954-20141110062942

Byakugan means white eyes or The all seeing white eyes. so all byakugan users have white eyes. but being that they are not pure hyuga and they have blue eyes. that could mean they do not have the byakugan or that there eyes will turn white when they activate them

them not having white inactivated eyes doesn't really mean anything. because one feature off an activated byakugan is the veins in the head activate and allow them the vision just like all other dojutsu the power of the dojutsu is not active unless the user wants it to be active. you can say that only the Rinne Sharingan and Rinnegan are the only eyes that are active always but we actually do not know if thats the case. we do not know if Hagoromo could turn off his Rinnegan or Sasuke can turn off his Rinnegan in the future of if Kaguya could turn off her Rinne Sharingan or what not.