The color blue has long been associated with royalty and riches. Any plant yielding blue dye was considered a valuable commodity, and there are only a couple of plants that do. It is possible that the…
A Brief History of Blue~Ancient Blue Pigments - Random Bits of Fascination
Woad and the Invention of Blue
Why blue is the costliest colour, Life and style
WOAD Field to Fashion Book by Ian Howard of Norfolk Scarce-to-find Blue Plant Dye History Textiles Cosmetics Farming Reference GIFT
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The 6,000-Year History of Blue Pigments in Art
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The World of Indigo - Schacht Spindle Company
Mystery of 'Maya blue' dye tied to human sacrifice
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Historical Dyes
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