Jaca, do you happen to have any good dark theme css file? Or do you know whether to found one? So it can be used on Settings/Default CSS. Vivaldi has a dark mode which I suppose it uses some css to force invert the colors on websites. It isn't perfect but it's good enough for regular usage. However idk how to locate and/or extract it (if its a css file after all).
Would be cool if - for example - there was an option for Wayfer to check the system clock and after a specific time (set by the user), to change at dark theme. I have loaded some css dark themes but everything I found seems half baked :/