General:
* Lliw llygaid: This means "eye color".
Specific colors:
* Glas: Blue
* Brown: Brown
* Gwyrdd: Green
* Grey: Grey
* Ambr: Amber
* Du: Black
Examples:
* Mae gen i lygaid glas. (I have blue eyes.)
* Mae ganddi lygaid brown. (She has brown eyes.)
* Mae ei lygaid yn wyrdd. (His eyes are green.)
Note: "Lliw" (color) can be used for any color, not just eye color. You could say "Lliw gwallt" (hair color) or "Lliw car" (car color).