Editing the style - selection styles

[sergioloporto]

Hello,

I would like the texts of the posts and threads of the forums [not titles, only texts] to have a different color when selected/highlighted with the mouse.

The same for the text of the articles of the CMS [appearing in the article page itself, and in the general content.php page].

The same for the text of blog posts/comments.

Please tell me if:

• there is a safe way to add the code so that when a new VB version will be released I don't have to copy and paste manually the new codes.
  
• Please tell me how and where I can change the code.

I know that I have to add this to the parapgraphs:

::-moz-selection{
background:#cc0000;
color:#fff;
}

::selection {
background:#cc0000;
color:#fff;

please help