The published braod-band UBV and multichannel spectrophotometry is correlated for the white dwarfs to provide the nonlinear color-color transformations between these systems. The hydrogen lines and continuum produce a bifurcation separating hydrogen-dominated and helium-dominated atmospheres in color-color diagrams, and account, in part, for the Eggen-Greenstein two sequences. The UBV color-luminosity diagram also is split over a wide range of temperatures; (U-V)0 is approximately calibrated by temperature for the two dominant composition types. Mapping of MV, (U-V)0 shows that most He-atmosphere in the steep dependence of MV on (U-V)0 from 8000 K to 13,000 K; (U-V)0 is a poor luminosity indicator in that range of effective temperature. Otherwise, good UBV photometry proves quite useful for the study of white dwarfs.