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Light curves and color evolutions of two classical novae can be largelyoverlapped if we properly squeeze or stretch the timescale of a target novaagainst that of a template nova by $t'=t/f_{\rm s}$. Then the brightness of thetarget nova is related to the brightness of the template nova by $(M[t])_{\rmtemplate} = (M[t/f_{\rm s}] - 2.5 \log f_{\rm s})_{\rm target}$, where $M[t]$is the absolute magnitude and a function of time $t$, and $f_{\rm s}$ is theratio of timescales between the target and template novae. In the previouspapers of this series, we show that many novae broadly overlap in thetime-stretched $(B-V)_0$-$(M_V-2.5 \log f_{\rm s})$ color-magnitude diagram. Inthe present paper, we propose two other $(U-B)_0$-$(M_B-2.5\log f_{\rm s})$ and$(V-I)_0$-$(M_I-2.5\log f_{\rm s})$ diagrams, and show that their tracksoverlap for 16 novae and for 52 novae, respectively. Here, $(U-B)_0$,$(B-V)_0$, and $(V-I)_0$ are the intrinsic $U-B$, $B-V$, and $V-I$ colors andnot changed by the time-stretch, and $M_B$, $M_V$, and $M_I$ are the absolute$B$, $V$, and $I$ magnitudes. Using these properties, we considerably refinethe previous estimates of their distance and reddening. The obtained distancesare in reasonable agreement with those of {\it Gaia} Data Release 2 catalogue.

the astrophysical journal. supplement series/astrophysical journal. supplement series

The $UBV$ Color Evolution of Classical Novae. IV. Time-Stretched  $(U-B)_0$-$(M_B-2.5\log f_{\rm s})$ and $(V-I)_0$-$(M_I-2.5\log f_{\rm s})$  Color-Magnitude Diagrams of Novae in Outburst