Enhance darkroom mode
I found that current darkroom mode is kind of awful, by inverting colors and supressing the green and blue color channel is not proper for logos or images. I think that first changing to grayscale an then just keeping the red colour will suit better than current implementation, as a feature request.
If all you want is red, then use Alt+Shift+Page Down until you get 800K.
Yes we have a new version that will do this, but it still needs some tweaking.
Will make sure we work on it more.