on 07 Apr, 2015 01:13 AM
Just adding a +1 to this.
I was searching for a good 10 minutes before I found this... Looked all throughout the preferences for the "invert colors" link and could not find it. This should be in the documentation and should perhaps have an option in the preference panel or the preference dropdown menu (cog icon) in the lower right.
"If you prefer light text on a dark background, Marked has you covered. In the Style preference panel, you can invert the colors any of the default schemes for a light on dark result, and if a custom theme is built properly it will work there as well."