cornflower

noun

• a slender Eurasian plant related to the knapweeds, with flowers that are typically a deep, vivid blue.

  • Genus Centaurea, family Compositae: several species, including the annual Centaurea cyaneus (also called bluebottle), formerly a common weed of cornfields, and the perennial C. montana, grown in gardens
• (also cornflower blue) [mass noun] a deep, vivid blue colour: from cornflower to azure, there are herringbones, checks, and ginghams