Color sampler inaccurate

[Expat]

The other thing that springs to mind Expat, that may effect what you are seeing, is whether; ‘Current Layer Only’ is selected or not in the Colour Sampler settings?
Make sure ‘Current Layer Only’ is selected and that you are on the correct layer that you wish to sample.
If the option is unselected, your mentioned “Overlay” layers may interfere with the correct colour selection.

Thanks, Mark. I just realized this thread is about the mobile version, my problem was with the desktop program. But it probably doesn't make much difference in this case.