Okay, so I realized that after Terranort "loses his memory" & becomes Ansem's apprentice he had brown eyes...I used to think that it was because Terra had taken back control of his body....but then I remembered that Terra has blue eyes. If Xehanort has yellow eyes & Terra has blue eyes, then why the heck does Apprentice Xehanort have brown eyes?!? I also considered Erauqs to be in control at the time, but he has what appear to be grey eyes, so I ruled that out. I hate when I can't make sense of my favorite series. Any thoughts?

I recognize that, but I literally just trying to point out that his eyes may be brown cause brown goes with tan skin, like Johnny Depp... Or AX but Johnny Depp is fitter like..

Now I think the best theory for it since it's been worked into the plot would be "two warring hearts inside his body unable to gain control, resulted in Apprentice Xehanort's eyes turning neither orange (norted) nor blue (Terra) to represent that neither are in control".  

 

Yep I agree as i have pointed out I thought that too earlier in the thread. It makes the most sense .

Fool. He is wearing contacts.