The absorption spectra of the cones differ ; one is maximally sensitive to short wavelengths , one to medium wavelengths , and the third to long wavelengths -LRB- their peak sensitivities are in the blue , yellowish-green , and yellow regions of the spectrum , respectively -RRB- .

One is specially sensitive to short wavelengths , the other to medium wavelengths , and the third to long wavelengths .
