  Photometric data in the UBV(RI)c system have been acquired for 80 solar
analog stars for which we have previously derived highly precise atmospheric
parameters Teff, log g, and [Fe/H] using high resolution, high signal-to-noise
ratio spectra. UBV and (RI)c data for 46 and 76 of these stars, respectively,
are published for the first time. Combining our data with those from the
literature, colors in the UBV(RI)c system, with ~0.01 mag precision, are now
available for 112 solar analogs. Multiple linear regression is used to derive
the solar colors from these photometric data and the spectroscopically derived
Teff, log g, and [Fe/H] values. To minimize the impact of systematic errors in
the model-dependent atmospheric parameters, we use only the data for the ten
stars that most closely resemble our Sun, i.e., the solar twins, and derive the
following solar colors: (B-V)=0.653+/-0.005, (U-B)=0.166+/-0.022,
(V-R)=0.352+/-0.007, and (V-I)=0.702+/-0.010. These colors are consistent,
within the 1 sigma errors, with those derived using the entire sample of 112
solar analogs. We also derive the solar colors using the relation between
spectral line-depth ratios and observed stellar colors, i.e., with a completely
model-independent approach, and without restricting the analysis to solar
twins. We find: (B-V)=0.653+/-0.003, (U-B)=0.158+/-0.009, (V-R)=0.356+/-0.003,
and (V-I)=0.701+/-0.003, in excellent agreement with the model-dependent
analysis.
