Representative panel for the CDMagic method, where a simultaneous fit in the B- and V-band light curves, the B vs. (B − V) and V vs. (B − V) diagrams, and the (B − V) evolution, is performed. More details are given in, for example, Fig. 13 in Höflich et al. (2017). We show the absolute V-band vs. (B − V) diagram populated with eight normal SNe Ia from the CSP-I (Krisciunas et al. 2017; SNe 2004ef, 2005eo, 2005el, 2005iq, 2005ki, 2005M, 2006bh, 2006D; in differnet symbols), the SN Ia 1991bg-like 2005ke (empty triangles), and the uncorrected (blue) and corrected (red) SN 2016hnk data points. Models from Höflich et al. (2017) are shown in green for reference; the two arrows are the reddening vectors representing the direction to which the data points are shifted when affected by R_V = 3.2 and R_V = 1.0. SN 2016hnk corrected data points lie on top of the other subluminous SN Ia 2005ke, and from the shift we estimate an R_V = 2.1 ± 0.6.