FWHM of the Hα (λ6563) line vs the same measurements for the He I (λ5876) line for separated time ranges since explosion: 0-10 days, 10-20 days, 20-30 days and 30-40 days. The markers are established by SN type, corresponding to type SNe IIb: blue triangles, SNe II: red circles, and SNe 87A-like: green squares. The colour bars show how the colour intensity changes depending on the number of days since the explosion.