This is my path for my HTML file: C:\Users\Lorenzo\Desktop\Capstone Project\HTML\index.html
and this is my path for my CSS file: C:\Users\Lorenzo\Desktop\Capstone Project\CSS\style.css
This is my path for my HTML file: C:\Users\Lorenzo\Desktop\Capstone Project\HTML\index.html
and this is my path for my CSS file: C:\Users\Lorenzo\Desktop\Capstone Project\CSS\style.css
Add
<link rel="stylesheet" type="text/css" href="../CSS/style.css">
// or
<link rel="stylesheet" type="text/css" href="..\\CSS\\style.css">
to your index.html file
Notice: If you're using Live Server on VSCode (like me). You have to open VSCode with the folder Capstone Project\, not HTML\, or you'll run into an error
Refused to apply style from 'http://localhost:3000/CSS/style.css' because its MIME type ('text/html') is not a supported stylesheet MIME type, and strict MIME checking is enabled.
That error has been discussed here
link your CSS on head part of HTML file
<html>
<head>
<title>Page Title</title>
<!-- link your style.css file -->
<link rel="stylesheet" type="text/css" href="style.css">
</head>
<body>
<!-- your HTML page body -->
</body>
</html>