Implementing CSS variables in HTML page

[Auzzie]

I have an HTML file that contains many background images and color mentioned in a external CSS file and it is linked inside header tag of the HTML.I would like to use CSS Variable to capture the path of the background images and colors and use this in the HTML file.Is it possible to use the CSS variables without using any Javascript or server side language or plugins. I can use pure CSS and HTML only to achieve this. I have also seen the http://lesscss.org site, but they used some plug-ins and that I can not use.Is this achievable? If it is, would anyone be able to write some example code?