[He tipped his shades back, giving her a look at his yellow eyes. the irises had a deep blue to them, and his eyes had a bit of a sunken look, like someone who didn't get out nearly enough.]

The ocular cavities usually have the color in the portion that surrounds light acquisition. I believe your species calls it the pupil. Most of our race also takes a certain pride in its bloodline and wears the color boldly.

[He put the glasses back in place.]

Only our fearless leader, Karkat, never did that... but I suspect his bloodline was very low.