How do I change the syntax highlighting CSS?

admin

Administrator
Staff member
I've a blog hosted on WordPress.com, and i purchased the "Custom CSS" update to modify CSS. Now I want to change some CSS options of <a href="http://en.support.wordpress.com/code/posting-source-code/" rel="nofollow noreferrer">Syntax Highlighting</a> provided by Wordpress.com. For example, i want that

Code:
   [code lang="C"] int main() { }
[/code]

will be displayed with a black background instead of standard white one. I've added in Wordpress.com
Code:
Appareance &gt; Modify CSS
the following code:

Code:
 .syntaxhighlighter
 {
    background-color: black !important;
 }

As explained <a href="http://www.question-defense.com/201...no-wrap-alternating-background-colors-cut-off" rel="nofollow noreferrer">here</a>, but it doesn't works.
Any idea?