The eyes have it. The beautiful colors that we carry around with us wherever we go are actually a summation of hues, tones, shades, saturation, contrast and context (what our bodies are currently producing that captures the light).
I think the depths of the eyes are exciting micro-color studies. When you factor in light, thought, perception, focus, and facial emotion, the eyes take on a new character. The eye is the furthest extension of the brain beyond the body, yet reveal a window to the soul.
From a simple "eye color" comes the complete reminder of the wonder and complexity of our own humanity.