The Hubble data are taken from the HST proposal 10468: E. Karkoschka (University of Arizona).
410 nm, 502 nm, and 673 nm
These images are a composite of separate exposures made by the WFPC2 instrument on the Hubble Space Telescope. Three filters were used to sample various wavelength ranges. The color results from assigning different hues (colors) to each monochromatic image. In this case, the assigned colors are:
Blue: 410 nm
Green: 502 nm
Red: 673 nm