Feature Request: Customize page margin color


I have been using Sumatra PDF for a long time, and I think that this is one of the best PDF viewers available for use. I know the text color and its background for FixedPageUI can be customized, but I wonder if the page margin (the left and right side of the page, usually just white) can be customized as well. If not, which I guess, can it be added to the software?
Thank you for such an excellent software!


in SumatraPDf-settings.txt
directly under FixedPageUI, have you tried GradientColors e.g.

FixedPageUI [
TextColor = #000000
BackgroundColor = #ffc0ff
GradientColors = #2828aa #28aa28 #aa2828
SelectionColor = #f5fc0c