[NVI]

Unfortunately, this will make colors look off on OS X. "highlight" color is different from the focus color on OS X.

Hardcoding colors for different OS-s might be more reliable.

[Skalman]

Oh, didn't know. You could even force highlight colors, by explicitly setting border or outline colors.

[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...