New SumatraPDF release 3.5.2 offers two Dark Modes
https://www.sumatrapdfreader.org/download-free-pdf-viewer
The basic Dark Modes only apply to the Sumatra skin color, not the contents of the PDF file.
To apply Dark Mode to the PDF content to go the Sumatra “advanced settings” and
Set “InvertColors = true” as shown below.
Theme = Dark
FixedPageUI [
TextColor = #000000
BackgroundColor = #ffffff
SelectionColor = #f5fc0c
WindowMargin = 2 4 2 4
PageSpacing = 4 4
InvertColors = true <<<<<
HideScrollbars = false
If the color gradients for “TextColor” and “BackgroundColor” are too extreme they can also be changed. To find alternate gradient codes I use:
windows settings/personalization
Play around with the custom color tool to find a gradient code to your liking for your screen. Note the gradient code but do NOT save it. Just replace the “TextColor” and “BackgroundColor” codes in the Sumatra advanced settings text file.
