[quote]given the right tools, you can change the appearance of scrollbars and such. we're actually annoyed at times at how our own scrollbars are almost impossible to see because there's very little contrast. (its all dark gray). Not sure what (if anything) you need on windows to tweak those colors. On Ubuntu its simply a custom-installed theme.[/quote] I am familiar with these themes, however what I said above still applies: [b]If the site uses its own styles, the site's styling will dominate unless you specifically tell your browser to override it.[/b] I can testify it works this way - for one, I am on a dark-themed Ubuntu right now (and managed to alter the appearance of such elements for another site just fine not long ago, no effort, no trickery needed)... 

@Celaira: For security and performance reasons, I'd advise against it...