It's not a linear scale from light to dark. There are three constituents: tea, milk and water. A weak cup of tea with a little milk looks different from a strong cup with a decent amount of milk. This should be a ternary plot.
It's not a linear scale from light to dark. There are three constituents: tea, milk and water. A weak cup of tea with a little milk looks different from a strong cup with a decent amount of milk. This should be a ternary plot.