Yes, it is located in scene-referred area.
You can also use color balance rgb module.
@paperdigits has already described that above.
in the developer version of darktable you can use the color pickers in the 4 Ways tab with ctrl+click to select the color.
If you then move global chroma to -100 and select same color with all color pickers in the 4 ways tab, you get a nice result, with the advantage that you can adjust both the hue and the saturation afterwards:
