[Explanation of a color]

The Ai-iro, it is that it is of dark blue Hanadairo as not a pure blue. One of the indigo dye of the oldest used as a blue dye. I’ve been talking about green Kariyasu and cork tree bark has been multiplied by the Heian period. It’s now called indigo pure deep blue, because in this made ​​since the Edo period. It was also known as “Japan Blue” in foreign countries from that or is habitually dyed indigo and goodwill and washcloth, painter many were used, including Utagawa Hiroshige.

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