napoleon blue

noun, often capitalized N

Definition of napoleon blue

: a deep blue that is greener and very slightly deeper than Yale blue and greener, lighter, and stronger than royal (see royal sense 8b)

called also Helvetia blue

Love words?

You must — there are over 200,000 words in our free online dictionary, but you are looking for one that’s only in the Merriam-Webster Unabridged Dictionary.

Start your free trial today and get unlimited access to America's largest dictionary, with:

  • More than 250,000 words that aren't in our free dictionary
  • Expanded definitions, etymologies, and usage notes
  • Advanced search features
  • Ad free!

History and Etymology for napoleon blue

after Napoleon I

Learn More About napoleon blue

Dictionary Entries Near napoleon blue


napoleon blue

Napoleon complex

See More Nearby Entries 

Statistics for napoleon blue

Cite this Entry

“Napoleon blue.” Dictionary, Merriam-Webster, Accessed 2 Dec. 2021.

Style: MLA
MLACheck Mark Icon ChicagoCheck Mark Icon APACheck Mark Icon Merriam-WebsterCheck Mark Icon


Test Your Vocabulary

Name that Thing: Flower Edition

Spell It

Can you spell these 10 commonly misspelled words?

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!