Definition of starch blue in English:

starch blue

noun

  • 1A blue powder (specifically smalt or azure) used to dye starch. Now historical.

  • 2A pale shade of blue or greenish-blue.

adjective

  • Of a pale blue or greenish-blue colour.

Origin

Mid 18th century. From starch + blue.

Pronunciation

starch blue

/ˌstɑːtʃ ˈbluː/