uTi vs. phase with markers colored by SALT2.4x₁. The left andmid panels show the uTi color prior to and following F99 dereddening, respectively. The right panel displays the B_SNf − V_SNf color evolution for reference, calculated from dereddened restframe spectra. Pre-peak observations show a scatter induced by the edge of the Ca H&K λ 3945 feature. uTi colors after peak show a strong stable correlation with light curve width.