69b132a6f4
If a color value of ['', '', 'NONE', 'NONE', ''] is given as value to the highlighting group, the resulting group definition would look like this: hi Normal ctermfg=NONE ctermbg=NONE which would result in the highlighting group being cleared (or even no set at all), therefore check that at least one other value exists and if not fall back to the highlighting definition of the Normal group.