|Image 1 - uncorrected jpeg version with blue colour cast|
|Image 2 - uncorrected RAW version with blue colour cast|
Well, after examining and then processing two images with quite sever colour cast I arrived at some interesting conclusions; which I had not been expecting.
|Image 3 - jpeg corrected version of photograph with blue colour cast|
The key one was that an image under artificial lighting (the kind I had used for both example 'corrections'), was much easier to correct when the colour cast was cold blue rather than green or magenta. I also found, by looking for a part of the image that contained expected grey (not actual image grey) i.e. the grey I saw at the time, I could successfully remove most of the colour cast - especially with the cold blue colour cast (Images 3 and 4). This I performed by using the 'white balance selector' in Lightroom on a part of the image I identified was grey at the time. I could have achieved similar results by dragging the white balance sliders but this would have been less efficient.
|Image 4 - RAW corrected version of photograph with blue colour cast|
|Image 5 - uncorrected jpeg version with magenta colour cast|
|Image 6 - uncorrected RAW version with magenta colour cast|
|Image 7 - jpeg corrected version of photograph with magenta colour cast|
|Image 8 - RAW corrected version of photograph with magenta colour cast|