Albert Henry Munsell (1858–1918) envisioned his colour categorisation system as akin to musical notation, bearing a specificity that aimed to liberate chromatic description from commercially-driven colour names: https://publicdomainreview.org/collection/munsell-atlas
@publicdomainrev I used a Munsell soil color book throughout college and career.
@publicdomainrev
It's easy to see where blendoku got its inspiration from.