What is Blue Celtic war paint?

Answer 1

Woad the Celtic warpaint is actually Isatis tinctoria, a member of the Brassicaceae family (also known as the cabbage family and the mustard family)

woad is a plant that grows in Europe, but it is now rescently thought that woad is an unlikely source of the blue colouring that the Celts stained their bodies with because it is irritable on the skin and a misinterpretation of julias ceasers accounts were supposedly inaccurate, they most likely used copper ore if they were to use anything, but there it may be possible that the color described was meant to be blue-green like a bottle, and also there have been accounts refering to green (the natinal color of Celtic Ireland) being a body paint color.. "Tacitus, Agricola 29 AD 98 'Already more than 30,000 men could be seen, and still they came flocking to the colours - all the young men, and famous warriors whose old age was fresh and green4, every man wearing the decorations he had earned"