I pulled my phone out of my pocket today, and noticed that it was greyscale.
I went into the accessibility options, and oddly, color filters are not turned on. In checking some other things, I realized that the colors were inverted, too, but that wasn't selected.
I've since turned on 'invert colors' so at least its a functional greyscale for images, but for the life of me, I can't figure out what happened.
It's an SE, still on iOS 11. I was doing some tool maintenance in my driveway, so I was crouching down a lot and it's possible that it might have detected something on the touch screen, but my phone's set to lock with no grace period, so it's unlikely. I had my home button set to smart invert on three presses, but that wasn't actually on.
Anyone have a clue what I might've done and/or how to fix it?