"Firefox addon that fixes low contrast text when using dark desktop theme"
cf. https://github.com/DmitriK/darkContrast
"A flat dark GTK-theme with ergonomic contrasts. It supports Gnome, Cinnamon, Xfce4, Mate and Openbox."
Cf. https://github.com/WernerFP/Shades-of-gray-theme
"It's astounding how many web designers forget to specify a background color on their site."