forum/css_styles folder
Find the default_css file that you are using - there are 4 folders (classic, dark, default and web wiz) - each one has a default_style.css sheet in every one of them
Open the file you want to change, and around line 450 you will see:
/* BBcode blocks */ .BBquote{ border: 1px dotted #999999; background-color: #FFFFFF; width: 99.5%; padding: 5px; margin: 8px 0px; text-align: left; overflow: auto; display: block; padding: 5px; } |
background colour in this example is white, so you could change it to black as an example by replacing FFFFFF with 000000