A graph with absorbance on the y-axis and wave length in nano meters on the x-axis. Four lines line (bell curve-esque in shape) each represent a cone and what colors that cone allows you to see. The grey line peaks at 370 nm which is in the ultraviolet part of the spectrum. The blue line peaks at 445 nm, which is in the blue part of the visible light spectrum. The green line peaks at 508 nm, which is the green part of the visible light spectrum. The red line peaks at 565 nm, which is in the orange part of the visible light specturm.