I can't recall the app but it was a similar toggle with a label, when you flipped the toggle the label lit up green indicating it was turned on. But the default state was off but how would you know?
The green / red is at least a half decent indicator (questionable for the colour blind folks though), but the current trend of very slightly different shades of grey is the pinnacle of utterly fucking stupid design; perfect for a non-interactive set piece in a gallery, just dumb for use for by human beings.
