HEX triplet is another format for describing HTML colors. Like RGB, HEX triplet defines colors by the amount of red, green, and blue. However, instead of decimal notation (from 0 to 255), it uses a three-byte hexadecimal number where each byte is a value in the range 00 to FF.^[3] The first byte corresponds to red, the second byte to green, and the third one to blue.

HEX codes are more compact and improve the load time of a web page slightly. Plus, in contrast to RGB, they're easier to copy and share. In code, you should write it like this: style="color:#ff6347;".