Japanese Color Encyclopedia Indigo dyeing
Japanese Color Encyclopedia 
Japanese Color Encyclopedia What is "Ao" (blue)? An explanation of the origin, history, and color schemes of this traditional Japanese color.
Japanese Color Encyclopedia What is Kame-no-zoki? An explanation of the origin, history, and color scheme of traditional Japanese colors.
Japanese Color Encyclopedia What is navy blue (kon)? An explanation of the origin, history, and color scheme of this traditional Japanese color.
Japanese Color Encyclopedia What is "Nokon" (dark blue)? An explanation of the origin, history, and color scheme of this traditional Japanese color.
Japanese Color Encyclopedia