the.com/colorless
The absence of hue, and occasionally of personality.
means Lacking color, or lacking vividness, character, and interest of any kind.
from From English color (via Latin color, related to celare, to conceal) plus the suffix -less, marking absence — literally without color.
Famous sentenceChomsky's grammatical-yet-meaningless colorless green ideas sleep furiously.
Light sciencePure water and air both qualify as colorless.
Double dutyDescribes both clear liquids and dull people.