WoltLab/com.woltlab.wcf.bbcode — comment on commit 5fa9bccef6a779d0f22fccc39b4ea92c7fdb1259
File: files/lib/system/bbcode/highlighter/CssHighlighter.class.php line 521
By Tr3kk3r:

The CSS 2.1 Specification Recommendation, as published by the W3C as of 2011-06-07, has an appendix including al valid properties.
You can find it here: http://www.w3.org/TR/2011/REC-CSS2-20110607/propidx.html. The Specification recommendation can be found here: http://www.w3.org/TR/2011/REC-CSS2-20110607/

As i see it, there is no final recommendadtion for CSS3 at the moment, but you can find partial information there: http://www.w3.org/standards/techs/css#w3c_all . For example there is an article about the borders and colors module and so on. it might take a while to piece all information together.

Hope i could help. Maybe harald nows of a better list, but thats all i found that seems to be reliable.