CSS works in combination with HTML. We can create buttons, links, and other elements using HTML and then using CSS we can change those elements’ size, color, position, etc.

How to Add a Hyperlink to External CSS. Cascading style sheets (CSS) are browser instructions for styling HTML elements that can be added to Web pages in one of three ways: externally, internally ...

WordPress' built-in editor has an HTML mode that lets you override the background color of a post by changing its CSS (Cascading Style Sheet) background-color attribute to the color of your choice.