They're not really that peaked, the M and L cones largely overlap, even, and are spread over at least a third of the entire visible spectrum. Pictures at: https

They're not really that peaked, the M and L cones largely overlap, even, and are spread over at least a third of the entire visible spectrum. Pictures at: https://en.wikipedia.org/wiki/Cone_cell https://en.wikipedia.org/wiki/Cone_cell