A triplet may refer to any of the following:
2. With a hexadecimal number, a triplet describes a group of three hexadecimal numbers. For example, "0000FF" is an example of a triplet hexadecimal color code used in HTML (hypertext markup language) to represent a light blue color. This triplet is divided into three sections: red, green, and blue. In other words, this color is made up of '0' red, '0' green, and '255' blue to make up the color blue.