[adjective], [noun] [U] - (of) a strong, slightly purplish, deep red colourWhen a person or their face is crimson, it is a sign that they are feeling a strong emotion, esp. embarrassment or anger.She went crimson with embarrassment and hid her face.
CRIMSON
Meaning of CRIMSON in English
Cambridge English vocab. Кембриджский английский словарь. 2012