The mean absorbance for the red cones was higher from about 400nm to about 430nm than it was for the green cones in at least one published paper.[1]

For some reason that's not clear to me, the graph below the data table doesn't extend the red cone curve far enough to the left to illustrate the hump.

[1] _Human visual pigments: microspectrophotometric results from the eyes of seven persons_, page 7 (labeled page 121) in https://royalsocietypublishing.org/doi/pdf/10.1098/rspb.1983...