Literary or formal term for a vivid, intense red. In everyday speech, 真っ赤 or 鮮やかな赤 are more common.
She appeared wearing a scarlet dress.
The sunset dyed the sky bright red.
bright red; bright scarlet
Compound of 鮮 (fresh, vivid) and 紅 (crimson, red). The exact historical derivation is uncertain, but the combination naturally yields the meaning 'vivid red'.