Mass‐to‐light ratios of galaxies in the V band (in solar units) as a function of galaxy ﹩B-V﹩ color. The solid line satisfies the relationship ﹩\mathrm{log}\,( M/ L_{V}) =1.40( g-r) -0.73﹩, given by Bell & de Jong (2001) for their sample of spiral galaxies. Their estimates and ours agree for ﹩B-V< 0.8﹩, where spiral galaxies dominate the galaxy population.