Cornflowers are small plants with flowers that are usually blue.
Her eyes were a bright, cornflower blue.
cornflower in British English
(ˈkɔːnˌflaʊə)
noun
a Eurasian herbaceous plant, Centaurea cyanus, with blue, purple, pink, or white flowers, formerly a common weed in cornfields: family Asteraceae (composites)
Also called: bluebottle. See also bachelor's-buttons
cornflower in American English
(ˈkɔrnˌflaʊər)
noun
an annual plant (Centaurea cyanus) of the composite family, with tiny, raylike, white, pink, or blue flowers forming a round head at the top of the stem