This red colour comes from madder (Rubia tinctorum) root overdyed with partly exhausted woad vat (what created interesting shade of dark red with a hint of burgundy).
Madder is one of the most ancient dyes (it was used by the early Egyptians, and the Greek and Romans). In Medieval times madder root was traded in markets all over Europe – especially in France and England. The red colour from madder was loved by Vikings. Among them, red clothes were worn even by kings, and often given as a precious gift.