The colors in the maps of the color advice did not match up exactly with other colors. For example, the viridis colors were not exactly the same as those in matplotlib, where the color map originated. The problem turned out to be with the color conversions in the Python colormap library. Specifically, the illumination got changed. The default illumination used when converting from sRGB space to LAB is different than the default illumination you get when directly creating a LabColor object. That means that conversion to LAB happened with one illumination and conversion back to sRGB happened in a different illumination. Fix the scripts and resulting tables to have explicit and consistent illumination.