Web color
A hex triplet is a six-digit, three-byte number used in HTML, CSS, PHP, JS, SVG, and other computer programs, to represent colors. The bytes represent the red, green and blue parts of the color. One byte represents a number from 00 to FF or 0 to 255 in decimal notation. This represents the least (0) to the most (255) intensity of each color component. The hex triplet is formed by concatenating three bytes in hexadecimal notation, in the following order: