3. Why HTML Thinks "chucknorris" is a Color
   The short answer: HTML doesn't actually "think" "chucknorris" is a color. It's a quirk of CSS, the language that styles HTML elements
4. Transparent Backgrounds in CSS
   Background-color: none is a valid CSS property that sets the background color of an element to transparent. This means that the element's background will be invisible
5. Interactive Backgrounds with JavaScript: A Guide to Changing Colors on the Fly
   Provides the structure and content of a web page.You create elements like <div>, <p>, etc. , to define different sections of your page