Historically, herbal dyes were used for most domestic clothing. Dyes created at home were often not very colorfast, so overdyeing and redyeing was normal
Viking Clothing Palette How to dye fabric, Natural dye fabric
Wool - Tribulations of Hand Spinning and Herbal Dyeing: Making
Slow Dyeing with Woad – WOOLLY ORIGINALS
Oak Spring Garden Foundation - Grow the Rainbow: Five Easy Plants
Woad Powder (Isatis Tinctoria)
We've fallen in love with woad - Outsider Fashion
Cochineal, Saffron & Woad Photos
Natural Dye: Experiments and Results
Blue Dye in History
The History of Indigo Dyeing and How It Changed the World
Medieval colours. This is the palette of natural, plant sourced
Wearing Woad
Colour by nature; natural dyes past, present and future.