My boy has the darkest brown eyes, they almost look black.
My girl has crystal blue eyes.
They couldn't be more different. And it surprises me almost every day.
But both of them get the exact same glint, a sparkle that looks like the sound of the word "squee", when they're giggling with glee or squealing with surprise.
The most humbling thing for me is recognizing in both of them the look that (although I can't see it myself) I know I also get in my eyes.
It is the purest form of joy.