(1) A hexadecimal representation.
(2) An RGB (Red/Green/Blue) code. Each code has a value from 0 to 255.
These codes can be used in computer art, Excel spreadsheet, even add color to calculators (mainly HP Prime).
Source: Wikipedia
Eddie
DM42 and HP 42S: Quadratic Equation, Characteristic Polynomial, and Eigenvalues The programs are listed for the Swiss Micros DM42 an...