For Royalty, for Everyone: Natural & Artificial Purples Doug Eyman Liz Iwinski Chad O’Neil
This is Just to Say I have eaten the plums that were in the icebox
and which you were probably saving for breakfast
Forgive me they were delicious so sweet and so cold. - William Carlos Williams
No single wavelength of light that can be called “purple”.
Humans only perceive purple when a mixture of blue light and red light hits their retinas.
331 BC: Alexander finds 190 year old purple robes said to be worth a fortune when he conquers Susa, the Persian capital.
392 AD: Emperor Theodosium of Byzantium restricts use of certain shades of purple to the Imperial family on pain of death.
Known as murex, this mollusk was the first source of purple dye for fabrics; extracting the coloring agent was was difficult and laborious.
Each mollusk produced such a small quantity of dye that thousands were needed for a single garment.