Hi Hardywang,
I have used a simple mathematical model to demonstrate the concept.
For Rawtherapee it appears the maths is different**. There may be some non-linear scaling or normalization taking place, I don’t know, but please don’t let this confuse you, the concept described in mine and Pat’s previous posts is still valid. They correctly demonstrate the behaviour of the sliders for the channels, it is just that the actual output values are slightly different.
So yes, with my simplistic model and a single input colour of R50 G200 B10, your slider values would produce the same output colour as “faded golden 1”, however for other input colours they would not produce matching output colours.
** I generated an 8bit tiff with paint.net filled with the input values R50 G200 B10. I then loaded this tif into Rawtherapee. Unmodified, Rawtherapee’s RGB percentages are near enough correct. (I don’t know why RT uses % for RGB values). Applying the slider values of “Faded Golden 1”, saving as an 8bit tiff and loading into paint.net shows unexpected output values of R42 G161 B64.
James