[eyes]: not just the colour, but the shape, the length of their eyelashes, whether they’re alert or usually half-closed, large or small, sunken into the face, ringed by bags, etc.
Rei’s eyes are a shade of purple just close enough to blue that you have to check twice before you can be certain. His glasses make them look a bit bigger than they are since they’re used for magnification, and you can seed the flecks of dark blue in them, close to the irises. They’re normally open all the way and are proportionate to his face; he has black eyelashes that are long enough to hit his glasses and goggles if he’s not careful. He really doesn’t like contacts a lot, and when he wears them, his eyes get red. After practice there are normally goggle lines around them, and a bit of a tan line from his sunglasses.