Fig. 8.
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Temporal (B − V) colour evolution, featuring SN 2020ue (blue stars) and SN 2020nlb (orange stars), along with a sample of nearby SNe Ia taken from Riess et al. (2016) and Khetan et al. (2021) (grey data), transitional SNe Ia (SN 2007on: Pink triangles; SN 2011iv: brown triangles, Gall et al. 2018), and early-time red SNe Ia (KSN 2017iw: violet squares; SN 2018aoz: green squares; SN 2021aefx: red squares, Ni et al. 2023b, 2025). The dashed black line indicates the Lira-law regime (Phillips et al. 1999).
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