Same experience here.

I was a member of a club that had a field on the top of a hill. One overcast but not raining day I arrived and another flier and I debated for 15 minutes whether the overcast would clear - it was an even grey sky. I decided to fly. Took off and went about 50 feet up and my WHITE undersided plane absolutely vanished.

I throttled down. Fed in right rudder and continued to drop the throttle as we listened and tried to place the sound with the plane. Eventually it dropped below the ceiling and all was fine. Though, I did pack up and call it a day.

Glad it wasn't one of my sportier planes that I have to think ahead of.