Kyo-Iro Fountain Pen Ink - Yurushi IroPale Red Plum Fountain Pen Ink All Kyo Iro inks are handmade in Kyoto, Japan using traditional dyeing techniques and materials. Pale crimson. In the past, the darker the color, the more expensive it was, and it was considered a "forbidden color" that was only allowed to be used by members of the royal family and high ranking people. "Kyo no Oto" is a series of writing inks that reproduce traditional Japanese colors that have been used since the Heian