Board Thread:Support Requests - Designing Your Wikia/@comment-26034751-20150425200547/@comment-26316686-20150425230244

Well inside of a wikitext table you can do it like this:

And you can apply a variety of CSS selectors to it. For example you could give your table the class "pink-headers" like this and add a CSS class for it in Special:CSS

And in your CSS .pink-headers th   { background-color: pink; }

The CSS rule (selector) is read from right to left as "any th element that is part of anything with the class 'pink-headers'" (th stands for table header, tr is a table row and td is table data).