ver ‧ mil ‧ ion BrE AmE , vermillion /vəˈmɪljən $ vər-/ noun [uncountable]
[ Date: 1200-1300 ; Language: Old French ; Origin: vermeillon , from vermeil 'bright red' , from Late Latin vermiculus type of insect from which red color is obtained, from Latin vermis 'worm' ]
a very bright red colour
—vermilion adjective