Red plum = soft red like a plum blossom.

Plum blossoms have been loved since ancient times as the flowers that herald the coming of spring in Japan.

"Plum" was often used in the color of the Heian period.

There are names such as

・Usukobai

・Hitoeume plum

・Tsubomi Kobai

・Umegane

The color of plum blossoms. Plum blossoms come in a variety of colors, including white, pink, and deep red.