@minimom
It's easy. Paint colors come from values called CIE L*a*b*.
This is why I tell people not to waste time on paint color formulas; the colorants or cutting the formula by %.
The question to ask is where do you think the formula COMES FROM?
Those formulas come from mathematical models that use said CIE L*a*b* values.
That's why I say that the color data values and notations I talk about all the time -- and are on my color wheel -- are like color DNA.
Formulas are just a recipe and they're useless to try to decode because, just like cooking, there's more than one way to mix up a color (or a dish).
CIE L*a*b* values is what brands use to copy other brand's colors and mix them using their home ingredients (colorants and bases).
Deep dive into the color wheel and how to create harmonies here: https://campchroma.com/color-strategist-color-wheel/
Brief video overview about how to use the hue angles on the wheel here: https://www.youtube.com/watch?v=n08N9Q2tv4A&t=40s
That should be enough to get you started.
Q