noncolor
Etymology
From non- + color.
noncolor means That which is not a color. Lexicurio rates it Sui generis — a strength score of 87 out of 100.
noun
- That which is not a color.“Because of the overwhelming consensus, a test for ability to separate the names of colors from those of noncolors would be fatuous (figure 5-1). Few test takers will achieve less than perfect scores.”