Why variations in colour with constant white balance and exposure settings a7rii?

Hi All,

I usually shoot product in a studio with Bowens strobes and xrite color checker profiles, for my wife's shoe company, habbotstudios.com.  I usually have excellent colour reproduction with this workflow.

I am looking to take my photography out of the studio into mixed light conditions and have a question about white balance variations.

I have attached three simple test shots, low res, identically framed and with the same camera settings.  I was wondering why they were rendered by the camera with distinctly different colours.  The middle of the three shots is clearly more green.  I took the shots in continuous shooting : low, because, I will be shooting a model under constant light and will want to shoot at a fast frame rate to capture small changes in her stance.

Settings were

1/50

f5.6

ISO 10000

White Balance 3800K M2 (set via a white balance custom test shot)

Shot on a sony a7rii with an FE 2.8/24-70 GM lens.

I realise that shooting RAW I can play with color in post, but I would like to start with consistency in my color use in camera.

Thanks for any help.  It is much appreciated.

Dan Abbott