Definition of Nile blue in English:

Nile blue

noun

mass noun
  • A pale greenish blue.

    • ‘He mumbled some obscenities and he closed his eyes painfully recalling the gorgeous Nile blue eyes looking blankly up at him, expressionless.’
    • ‘I still remember how they painted the long road into the museum a deep Nile blue.’
    • ‘The installation consisted of a suspended upside-down pyramid made of small squares of embossed gold foil, which was poised over a pile of sand with a mirror set in it and surrounded by walls painted a deep Nile blue.’

Origin

Late 19th century: suggested by French eau de Nil.