Yun Hyong-keun. Burnt Umber & Ultramarine, 1976-1979. Oil on linen, 140.2 x 140.5 cm. Courtesy of Yun Seong-ryeol & PKM Gallery.
Yun Hyong-keun. Burnt Umber & Ultramarine, 1981-1984. Oil on linen, 91.8 x 115.2 cm. Courtesy of Yun Seong-ryeol & PKM Gallery.
Yun Hyong-keun. Umber-Blue, 1975-1976, Oil on linen, 180 x 200.3 cm. Courtesy of Yun Seong-ryeol & PKM Gallery.