21CT55 Screen-Shot Test

[old_tv_nut]

Several of the stitched shots (but not all) are bluer on the top.
Do I understand correctly that all these appeared to match to the eye?

Is your camera white balance set to a fixed setting (daylight), or is it set to automatic? You cannot get consistent results on automatic white balance, as the camera is trying to guess the lighting conditions, and slight variations in the content can cause it to move one way or another.