I gave my Hawke brown eyes, flat colors be damned. Because someone should have them.
It bothers me so much that developers can't or don't even bother get darker brown eyes right.
Brown has a lot of variety, as other colors, but people don't always even realize, I think. Mine are dark but not too dark, and my irises have a darker ring around them. My dad's are slightly lighter. My mom's are darker.
Yeah, but, and I say this as a brownie myself, brown just isn't a very interesting color.
Eye colors are usually used to express certain personality traits in fictional characters and while blues and greens can go into a vast array of personality types depending on their shade and how they're described brown usually only gets you doe-eyed, down to earth, normal, maybe compassionate and warm, but it doesn't have the variety that other colors do. Brown is almost never anyone's favorite color, it's just too background-y and bland.
I do think it is odd that the devs haven't had any prominent dark brown eyed characters though. I think dark brown eyes can be prettier and more expressive than hazel and light brown yet all the brown eyed characters have light brown eyes.