@snibgo - your JPG is a really nice one, thanks for sharing 
Now, I’m a little puzzled I must admit 
and I try to sum a little up my updated experience here:
- It seems that in the meantime, Windows “photo” did some improvements. After a short flickering from “red” = green and “blue” = red, it renders the colors now correctly showing “red” = red and “blue” = blue on my Windows 10 system. So I withdraw my comment above concerning Windows “photo”
- Interestingly, Windows “mail” still renders it incorrectly: “red” = green and “blue” = red.
- Firefox on Android => wrong
- Firefox on Windows => correct
So I really appreciate this little helper… 