LSST r − i color evolution for the Type Ibc simulations of D21 and Dessart et al. (in prep.) together with the counterpart for Type Ib SN 2004ao, and Type Ic SNe 2004gk and 2013ge (Modjaz et al. 2014; Shivvers et al. 2019; Drout et al. 2016). The photometry is inferred from the spectra, by convolution with the LSST filter transmission curves, uncorrected for reddening or redshift – both are small. The data were retrieved from WISEREP (Yaron & Gal-Yam 2012).