Anyone who’s built a webpage has encountered hexadecimal colors–the six-digit codes that identify one of 16,777,216 different colors you encounter on the web. It’s easy enough to identify ...

Hex codes are especially useful for matching colors in an Illustrator document to those on a Web page, as both HTML and CSS use hexadecimal codes to specify colors.

Chrome's built-in Color Picker allows you to see the HEX code, RGBA values, HSLA values, HWBA values, ICHA values. Learn how to use it.