Board Thread:Support Requests - Designing Your Wikia/@comment-26318283-20150508174536/@comment-4902411-20150508182811

Most places that link to wikia.css or common.css (or any code page in general) come with a block of text that needs to be added to the linked code page. That is the "code".

When you say you wish to change the color of the links to "non-existent sites", I assume you refer to links to articles within that wiki which do not exist? If so, add this to your wiki's common.css: and replace red with whatever color you'd want.

As for the background, use the theme designer.