You are welcome to add the CSS buttons below to pages that uses style sheets providing that the following guidelines are met:
The “Valid CSS!” button has extra rules:
If you use this last button, you are claiming that your page's CSS style sheets have been checked for correctness. Go to the CSS validator and test your page: it will tell you whether you can use this logo and if so, how.
The set of buttons below are partly transparent so that they “adapt” to the environment. Get it? The three buttons are rendered on different background colors below:
Logo design by Verso [link back to 1997] with W3C staff.