The default Video.js skin is made using HTML and CSS, so there's no need to learn a complicated skinning language to update colors or even create an entirely new skin. New in version 3.0 is the use of a sprites image file (video-js.png). The image allows for a little bit more classy design, as well as compatibility with older versions of IE now that the HTML skin also shows when Flash is used for those browsers.
You can view the uncompressed CSS for the default skin by downloading the latest version of Video.js or viewing [the source version](https://github.com/zencoder/video-js/blob/master/design/video-js.css) on Github.
You can either override styles in the default skin: