LSST color-color magnitude diagram for the Type Ibc simulations of Dessart et al. (in prep.) from 100 to about 450 d after explosion. We show the color curves r − i vs. g − r for our He-star explosion models from 100 d (indicated by a star symbol) until the end of the simulation at around 450 d. Dots are equally spaced in time every 20 d. The arrow corresponds to the color shift caused by A_V = 1 mag.