Before Indigo was used, "woad" (Isatis tinctoria) was used. "Woad is an old color. A conversation with history. A natural dye. An ugly plant. Locked in green leaves, compounds that break into pigments of blue.
Extracting natural blue pigment from the leaves of the Woad plant. The pigment has traditionally been used to dye wool but it can also be used in naturally colouring soap. ** Latin name = Isatis Tinctoria ** French name = pastel des teinturiers **