
Originally Posted by
Diane Miller
The camera can only guess at the colors and often gets it wrong when one colors is dominant. Go back to the raw file and try choosing a different camera profile to start with then tune from there. Selecting the BG and using channel mixer sounds like the hard way. You have now gotten a very bright saturated yellow where you had some pleasing darker areas in the original.
Try what you can do with WB in raw, then the HSL sliders. Then in PS if you need to do more, try Selective Color or Hue-Sat. A global adjustment should work as the camera's misinterpretation of the colors was global.