So this new dark mode is really amazing, especially because it works in the compose window! But what about the message window (the email body).
Is there a way to get a dark mode there? Or do I need to create addon for that 
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So I decided to build addon that will invert page and shift hue.
And it looks better than I though (considering it took me only two hours to build and release it!)
Introducing, “Darko”!