w3schools.com styling css with > code example
Example 1: how to link css to html
<link rel="stylesheet" href="PathToYourFile.css">
Example 2: how to write css in html
<p style="color: blue; font-size: 46px;">
<link rel="stylesheet" href="PathToYourFile.css">
<p style="color: blue; font-size: 46px;">