There are several ways to change text color with CSS: inline, internal, or external CSS. How to change text color in HTML with inline CSS. This method is called inline because the CSS is placed ...

To use a third-party Web font you must add an extra block of code attaching the font's CSS to your theme. Copy the code from the font website and then paste the HTML code for the style sheet ...

Fortunately, Tumblr enables you to change the font size for your blog's text by giving you direct access to the raw CSS or Cascading Style Sheet code of your theme. Log in to your Tumblr blog.

Where HTML defines the structure and content of a web page, CSS (Cascading Style Sheets) is the coding that underlies the appearance and formatting, from type sizes to columns and floating boxes.