The nice thing about working on panel is that you can erase any wet paint with a razor and a rag. So with a couple of flocks of my wrist I erased a mistake hours in the making, and restarted the sky, a few hues lighter.
But don't try and adjust your screen; I can barely see the difference either, but trust me, it is there. At this point, here are the three in this series waiting for a foreground to be complete.
-jb.