Wiktionary
beetroot red
n. A glycoside obtained from beets and used as a food dye, also known as betanin and E162.
Usage examples of "beetroot red".
His eyes now resembled those of the late great Peter Lorre and his face was a most distressing shade of beetroot red.
Unfortunately that was difficult to do when you knew your face had turned beetroot red.
Guillemot's eyes flickered with panic at the remark, and his ears flushed beetroot red.
The younger witch sidled speechlessly into the room, face beetroot red, arms held behind her back.