What does colourless mean?
Colourless describes something entirely lacking in colour — a transparent liquid, a pale gas, or a washed-out fabric — as well as, by extension, anything figurative drained of vitality or interest. It is the standard British spelling of what Americans write as colorless. In scientific contexts the word is purely descriptive: carbon dioxide and water are routinely called colourless liquids or gases, with no negative judgement implied. In everyday and critical use, however, it carries a distinctly unfavourable connotation: a colourless performance is one that fails to engage, a colourless personality one that leaves no impression, and colourless prose writing so bland it blurs into the background. This dual character — neutral in the laboratory, damning in the review — makes the word especially useful for precise contrast: pairing it with vivid, colourful, or striking throws the deficiency into relief. Related terms such as insipid and drab overlap with its figurative sense, but colourless remains the most direct way to say that something simply lacks the quality that would make it noticeable.
adjectiveLacking colour; pale or transparent. (US spelling: colorless.) Figuratively, dull, lifeless, or lacking interest or personality.
- Physically without colour; transparent or white.
- Figuratively dull, unremarkable, or lacking personality.
"The walls had faded to a colourless grey after years of sunlight."
"Carbon dioxide is a colourless gas with a faintly sharp odour at high concentrations."
"His speech was accurate but colourless, and half the audience drifted off."
Water is famously 'colourless, odourless and tasteless' — a phrase so fixed that adding any adjective to it sounds wrong.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of colourless
The word combines 'colour' — from Latin color via Old French colour — with the native English suffix '-less', meaning 'without'. It emerged in written English around the early seventeenth century, when '-less' was being productively attached to many nouns to form privative adjectives. Its cognates therefore include all words descended from Latin color, such as 'colourful', 'discolor', and the French couleur.
How colourless is actually used
'Colourless' is chiefly British spelling; American English uses 'colorless'. The figurative sense (dull, bland) is common in criticism of writing, speech, and personalities. In chemistry, describing a substance as colourless is standard neutral description rather than negative.
Easily confused with colourless
'Colours' is the plural noun for hues or pigments, while 'colourless' is an adjective describing the absence of colour.