Hi @miaohaha, I downloaded the file and when I opened it I believe I could see the disappointing colors that you are seeing. In the color calibration module I set the WB to as shot in the camera and it had a little purple cast in my opinion in the clouds. I then experiment with options for using the eyedropper to set the calibration module and setting the illuminant to detect from image edges gave me a good WB for the sky in my opinion. I then saw the greens looked dull in the foreground. I felt this was less of a WB problem and more of a saturation problem so I used the new rgb primaries module to increase the purity of the green. Without seeing the original scene I am unsure if a desired result was obtained from this. I would suggest reading the manual for both of these modules. darktable 4.6 user manual - processing modules
I also wonder how the out of camera JPG looked? I rarely care about the cameras JPG, but I wonder if it had nice colors or the same problem.
