[thomasahle]

And different OS themes... And updating the list every time they change...

[rorrr2]

I doubt you can detect an OS theme with Javascript or CSS.

[Skalman]

You can actually partially detect it with Firefox.

https://developer.mozilla.org/en-US/docs/Web/CSS/:-moz-syste... https://developer.mozilla.org/en-US/docs/Web/CSS/:-moz-syste...