I usually use XnView MP as a reference viewer, since I thought Windows Photos and LXImage-Qt doesn't support it. However, I ran across this test today. It seems that XnView MP doesn't support color management at all, as the
sRGB_Gray.jpg looks red with text saying the viewer doesn't support it (it should look gray).
Can anyone recommend a free (open source preferred), cross-platform image viewer that supports color management?