I will try to reply to comments later, I need to think about it.
I still have an additional idea.
7. Colors in Validation Results
Image: sigil-validation-results-colors.png
System variables are cool, but an even better section would be in the sigil_tweaks.ini file (if the file does not exist – default settings are used).
Code:
[tweaks]
border=false
link_color=#3333FF
validation=foreground
info_color=#72A5D4
warning_color=#D4A572
error_color=#DE5E5E
border (#3) – true/false
link_color (#2) – do not like blue or is illegible? enter your color for links
validation (#7) – foreground/background. Whether the color in the Validation Results window is to be set for text or for the background
info_color, warning_color, error_color – own colors in Validation Results