[Explanation of a color]

The Aku-iro, it is a gray tinged with the creamy, such as lye. Poured hot water ash which has resulted from burning wood or straw although that of the supernatant, lye was used as detergent and fabric dyeing mordant for a long time. There is a Hai-iro color that is similar, but it is the color of ash made ​​in that can be after burning of coal.

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