its a little leaf like thing u can buy for making blue dyes
you get it from woad leaves. Either buy these in the Falador garden, or you can buy them in the grand exchange
woad.
woad.
2 woad leaves and 5gp for Aggie (in draynor) to make them, or you can just buy it from Lleyta.
Blue, made from woad
woad
To make blue dye.
Woad is made from the leaves of the plant Isatis tinctoria. The leaves are harvested, dried, and powdered to create a blue dye. This dye has been historically used for textile dyeing.
The blue dye used by Ancient Britons to paint themselves was called woad. Woad comes from the plant Isatis tinctoria and was commonly used by Celtic tribes in Britain for body painting and clothing dyeing.
Woad
Buy it from the Grand Exchange. It rarely ever sells, but you will get it if you have patience. Or you could always make it. I believe you need a woad leaf that you can buy a farmer in the Falador garden.