Would be cool to get an original copy of "Colors for Interiors: Historical and Modern by Faber Birren" and create color matches assuming it's not faded too much. I wonder if he created some kind of pigmentation ratio (or however paint coloring works) that he shared somewhere?
Planet Money had a story about the quantization of color[0]. Prior to this, people would essentially bring in a flower, piece of pottery, etc that they wanted to color match for the particular piece at hand.
[0] https://www.npr.org/2024/07/19/1197961103/pantone-colors-law...