ConstReturns the available colors that may be
used in the ThemePresets.get() method.
Note that if you are trying to enumerate all possible theme presets, do not forget about handling the accent.
Returns a Theme object matching the given colors.
Applicable when preset is one of {
light, dark, gray, graylight }. Ignored if equals one
of { light, dark, graylight }.
Theme preset utilities.