How do I learn to code in HTML and CSS on my Mac? Web design is one of the most useful skills you can learn, and it’s easy to learn HTML and CSS (the two main pillars of web pages) in Mac OS X.

The HSL model stands for Hue, Saturation, and Lightness. In this model, hue is a bit like a base color (red, orange, etc.) while saturation approximates that color’s intensity, and lightness describes ...