Quick answer: Both spellings are correct. Use colour if you’re writing for British, Canadian, Australian, or other Commonwealth English audiences. Use color if you’re writing for American English audiences. Neither is wrong—they’re simply regional variations of the same word.
If you’ve ever paused mid-sentence wondering whether to type “colour” or “color,” you’re not alone. This is one of the most common spelling dilemmas for writers working across different English-speaking regions. The confusion stems from the fact that both versions appear in published materials, but they serve different geographic audiences.
According to Grammarly’s guide on commonly confused words, the distinction is purely regional: American English dropped the “u” in the 19th century, while British English and its descendants retained it.
| Term | Meaning / When to use | Example sentence |
|---|---|---|
| Colour | British English spelling; use for UK, Canada, Australia, New Zealand, and other Commonwealth countries | “The artist mixed every colour of the rainbow on her palette.” |
| Color | American English spelling; use for United States audiences | “What color should we paint the conference room?” |
When to use colour
Use colour whenever you’re writing for British English audiences or following UK, Canadian, Australian, or New Zealand style guides. This includes academic papers submitted to British universities, business correspondence with UK clients, content for Australian websites, or any publication that follows Oxford or Cambridge style conventions.
The rule is straightforward: if your target audience is outside the United States (with some exceptions noted below), default to colour.
Here are real-world examples I’ve corrected in my years as a copy editor:
Email to a London client (incorrect): “We’ve updated the brand color palette per your request.”
Corrected: “We’ve updated the brand colour palette per your request.”Resume for a Toronto job application (incorrect): “Managed social media accounts and ensured brand color consistency.”
Corrected: “Managed social media accounts and ensured brand colour consistency.”Text message to a Sydney colleague (incorrect): “Love the new color scheme on the website!”
Corrected: “Love the new colour scheme on the website!”
In my experience editing manuscripts for international publishers, I see this error constantly in cover letters from American applicants targeting UK positions. They’ll write an otherwise perfect application, then undermine their attention to detail by using “color” instead of “colour.” It’s a small thing, but it signals that you haven’t tailored your application to the local market.
When to use color
Use color exclusively when writing for American English audiences. This includes US-based websites, American academic journals, marketing materials targeting US consumers, internal company communications for American businesses, and any content following Associated Press (AP) or Chicago Manual of Style guidelines.
The American spelling is shorter and more phonetic, which aligns with Noah Webster’s 19th-century spelling reforms aimed at simplifying American English.
Real examples from my editing work:
LinkedIn profile for a US recruiter (incorrect): “Specialist in brand colour strategy and visual identity.”
Corrected: “Specialist in brand color strategy and visual identity.”Cover letter to a New York firm (incorrect): “I would bring a fresh colour perspective to your design team.”
Corrected: “I would bring a fresh color perspective to your design team.”Product description for a US e-commerce site (incorrect): “Available in three colours: navy, charcoal, and burgundy.”
Corrected: “Available in three colors: navy, charcoal, and burgundy.”
I once edited a 300-page technical manual for a Silicon Valley company where the author—a British expat—had used “colour” throughout. We had to run a global find-and-replace because the US engineering team found it distracting and unprofessional. The lesson? Match your spelling to your audience’s expectations, not your personal preference.
How to remember the difference
Here’s the memory trick I teach every junior editor: Americans are color-ful without the “u.”
Think of it this way: the United States is known for being bold, direct, and efficient. The American spelling color reflects that—it’s shorter, faster to write, and gets straight to the point. British English, with its preference for tradition and historical continuity, keeps the u in colour as a link to its French and Latin roots.
Another editor-level insight: notice that colour has a u in it, just like UK. Both start with “U.” If you’re writing for the UK (or other Commonwealth countries), keep the u. If you’re writing for the US, drop it.
I also use this mental check: honour/honor, favour/favor, neighbour/neighbor all follow the same pattern. If you remember one, you remember them all. When I’m proofreading quickly, I’ll search for one of these words to verify which regional spelling the document is using, then check that colour/color matches.
Common mistakes and exceptions
The biggest mistake I see is inconsistent spelling within a single document. Writers will start with British English, then slip into American spelling halfway through, or vice versa. This looks sloppy and suggests careless editing. Pick one regional standard and stick with it throughout your entire document.
Another frequent error involves Canadian English. Canada officially uses British spelling (colour, centre, favour), but American influence is strong, and many Canadians mix the two. If you’re writing for a Canadian audience, default to colour unless your client specifically requests American spelling. I’ve edited government documents, university publications, and corporate reports for Canadian clients—all used colour as the standard.
Here’s a concrete mistake I corrected last month:
- University of Melbourne research paper (incorrect): “The study examined color perception across different age groups.”
Corrected: “The study examined colour perception across different age groups.”
Australian universities require British spelling, and using American variants can result in marks being deducted for poor presentation.
One exception worth noting: brand names and proper nouns. If a company spells its name “ColorTech” (with American spelling), you keep that spelling even in British English text. Similarly, if you’re quoting an American source that uses color, preserve the original spelling in your quotation.
Technical and scientific writing sometimes follows different conventions. Many international scientific journals use American English regardless of where they’re published, because it’s become the lingua franca of research. Always check your target publication’s style guide. As noted in discussions about correct usage and standards, adherence to established conventions is what makes communication clear and professional.
Software interfaces present another gray area. Microsoft Word, for instance, uses American spelling in its US version but British spelling in its UK version. If you’re writing UI copy or technical documentation, match the spelling to the software’s localization, not your personal preference.
I once worked on a multinational marketing campaign where the creative team used colour in the UK ads and color in the US ads, but someone accidentally swapped them during production. The UK billboard went up with “Choose your color” and the American website said “Available in six colours.” It cost the client thousands to reprint and reprogram. Consistency matters.
Frequently Asked Questions
Is “colour” wrong in American English?
Yes. Using colour in American English is considered a spelling error. American style guides, including AP and Chicago, require color. If you’re submitting work to US publishers, schools, or businesses, always use the American spelling.
Can I use either spelling in international contexts?
You can, but you shouldn’t mix them. Choose one regional standard based on your primary audience and apply it consistently throughout your document. If you’re writing for a truly global audience with no clear regional focus, pick either American or British English and stick with it—don’t alternate between the two.
Why did American English drop the “u” from colour?
Noah Webster, the American lexicographer behind Webster’s Dictionary, led spelling reforms in the early 1800s to distinguish American English from British English and make spelling more phonetic. He argued that silent letters like the u in colour were unnecessary. His reforms stuck, and color became the standard American spelling.
Does autocorrect fix colour/color mistakes?
Not reliably. Autocorrect tools typically accept both spellings as correct because they’re both valid in different regions. Your spellchecker won’t flag colour as wrong in a US English document unless you’ve specifically set your language preference to “English (United States).” Always set your word processor’s language settings to match your target audience.
Samantha Jones graduated with a Bachelor’s degree in English Literature from Oxford University and has been involved in language education for over 15 years. Her expertise lies in comparative language analysis, focusing particularly on the differences and similarities in spelling across various English dialects. Samantha’s passion for this niche developed from her love of storytelling and desire to preserve the subtle differences that make English unique around the globe. On SpellRightDaily, she crafts detailed articles that compare common spelling errors and offer practical advice for writers and editors looking to polish their work. Samantha’s content is known for its clarity and depth, helping readers decode complex spelling issues and improve their writing skills. She also enjoys delving into the psychology of language learning, and how cognitive factors influence the retention of correct spelling patterns. Her engaging writing encourages a deeper appreciation of the language’s rich diversity.