Having two shades of one color in one, but still showing a distinct difference.
I have a dual iris, the outer color is a light green and the inner is a dark green.
Iris and Hidde are one couple from the Netherlands. They are in the same Venray high school. They found each other there, and fall in love with each other.
You: Oh my god, that is iris and hidde! The most cute couple in the whole world.