napoleon blue
noun
often capitalized N
: 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
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“Napoleon blue.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/napoleon%20blue. Accessed 22 Nov. 2024.
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