I made a picture in Krita to use as an avatar with Twitch and Steam. I exported to a PNG and uploaded it, but it looks far too dark on the website. I tried both options of the "force sRGB" checkbox in the export dialog, with no change. If I look at my PNG with another image viewer, it looks correct. The thumbnail in Windows Explorer looks correct. Even if I look at the PNG with my web browser (Firefox, the same thing I'm using with those websites), it looks correct there.
Clearly Twitch and Steam are doing something to the PNG to make the colours dark, but what? Is there something I can change in Krita to stop the colours getting mangled?