A set of colors exported from NIPPON COLORS - 日本の伝統色 to https://qotes.github.io/Colors.
It's designed to be capable of rendering any set of colors as long as they suit the data schema as the whole site is built, unlike the NIPPON COLORS which is mostly with pictures, with pure JS + css. So the key of it is portable, since we're not rendering with pictures, and responsive.
Another significant difference worth mentioning is that the repo is much more practical, it's not just for displaying but a tool helps on choosing colors.
Site under Copyright (c) 2019 Sy.
Exported from NIPPON COLORS - 日本の伝統色.
Color data cited: “日本の伝統色 The Traditional Colors of Japan”. PIE BOOKS, 2007.