Board Thread:Skyrim/@comment-12323841-20130716084813/@comment-26984208-20190516185021

Tiber Septim, Symmachus, that Khajiit...Barenziah boinked a lot of people.

Anyway after making new friends in the form of TES fans, one of them revealed to me something; that all Dunmer royalty have purple eyes (they saw it on UESP which is known to be accurate with lore).

However, because I can't find the source let's go with this explanation: red eyes are the massively dominant eye colour with mutations occuring aka Karliah and many Dunmer OCs in ESO (which is canon btw).