Historically, herbal dyes were used for most domestic clothing. Dyes created at home were often not very colorfast, so overdyeing and redyeing was normal
Natural Dyes: Use in Large-Scale Companies - Yana Dobreva
Wool samples dyed with fresh woad leaves from the second harvest
The History of Indigo Dyeing and How It Changed the World
Slow Dyeing with Woad – WOOLLY ORIGINALS
Colour dyes: a (very) short history of dyes from around the world
Plant Dye Colors in the Viking Age
Eco-Friendly Dyes for Textiles - Textile Learner
Homegrown Woad - Three Ways of Extracting the Elusive Blue Pigment
Natural Dye: Experiments and Results
Dyeing for Color Antiques, Collectibles & Historical Stories
We've fallen in love with woad - Outsider Fashion
Natural Dye: Experiments and Results
The Toxic History of Color