cobalt blue: meaning, definition, pronunciation and examples
B2Semi-technical/Formal artistic, design, and manufacturing contexts; descriptive in general use.
Quick answer
What does “cobalt blue” mean?
A specific deep, vivid shade of blue named after the chemical element cobalt, known for its intensity and saturation.
Audio
Pronunciation
Definition
Meaning and Definition
A specific deep, vivid shade of blue named after the chemical element cobalt, known for its intensity and saturation.
Can refer to the pigment or paint made from cobalt salts of alumina, or more generally to any object or surface of this distinctive colour.
Dialectal Variation
British vs American Usage
Differences
No significant difference in meaning or application. Spelling remains identical ('cobalt blue').
Connotations
Slightly stronger association with fine art and pottery in British usage (due to historical Staffordshire ware). In American English, more frequent in design and fashion contexts.
Frequency
Equally low-frequency in both varieties; used in specialised domains rather than everyday speech.
Grammar
How to Use “cobalt blue” in a Sentence
[be] + cobalt blue[paint/colour] + [object] + cobalt blue[made of] + cobalt blue + [material][in] + cobalt blueVocabulary
Collocations
Examples
Examples of “cobalt blue” in a Sentence
verb
British English
- The potter decided to cobalt-blue the rim of the vase.
American English
- The designer wants to cobalt-blue the accent wall.
adverb
British English
- The sky shone cobalt blue after the storm.
American English
- The pool tiles glittered cobalt blue in the sun.
Usage
Meaning in Context
Business
Used in product descriptions for fashion, home decor, or automotive colours (e.g., 'The new model comes in a stunning cobalt blue.').
Academic
Used in art history, chemistry, and material science to describe pigments, ceramic glazes, or historical artefacts.
Everyday
Descriptive for clothing, home furnishings, or natural scenes (e.g., 'Her eyes were a striking cobalt blue.').
Technical
Precise reference to the inorganic pigment cobalt(II) aluminate (CoAl₂O₄) in chemistry and industrial manufacturing.
Watch out
Common Mistakes When Using “cobalt blue”
- Incorrectly hyphenating as 'cobalt-blue' in all contexts (it's typically hyphenated only when used as a compound modifier before a noun: 'cobalt-blue dress').
- Pronouncing 'cobalt' with stress on the second syllable (/kəʊˈbɒlt/).
FAQ
Frequently Asked Questions
No. Cobalt blue is typically deeper, slightly greener, and less reddish than royal blue, which is a brighter, more purplish blue.
Yes. As a noun: 'Cobalt blue is my favourite colour.' As an adjective (often hyphenated): 'She wore a cobalt-blue scarf.'
It is named after the chemical element cobalt, as the colour is derived from cobalt(II) aluminate or other cobalt salts used historically as a stable blue pigment in glass, ceramics, and painting.
Not very common. It is more specialised than basic colours like 'red' or 'blue'. It is used when someone wants to be precise or descriptive about a specific, intense shade of blue, often in art, design, or manufacturing contexts.
A specific deep, vivid shade of blue named after the chemical element cobalt, known for its intensity and saturation.
Cobalt blue is usually semi-technical/formal artistic, design, and manufacturing contexts; descriptive in general use. in register.
Cobalt blue: in British English it is pronounced /ˈkəʊ.bɒlt ˈbluː/, and in American English it is pronounced /ˈkoʊ.bɒlt ˈbluː/. Tap the audio buttons above to hear it.
Phrases
Idioms & Phrases
- “None specific to the colour term.”
Learning
Memory Aids
Mnemonic
Think of the deep, rich blue of a vintage porcelain vase or a tropical ocean at dusk – that's COBALT blue, a colour as distinct as the metal it's named after.
Conceptual Metaphor
INTENSITY IS DEPTH (e.g., a 'cobalt blue' sky implies a deeper, more profound blue than a standard one).
Practice
Quiz
In which field is the term 'cobalt blue' most precisely and technically defined?