a system of colors used to indicate the electrical value of a component Resistors have bands of color on them to indicate their resistance Also, see Resistor Color Code Table
The ANSI established color code for thermocouple wires in the negative lead is always red Color Code for base metal thermocouples is yellow for Type K, black for Type J, purple for Type E and blue for Type T
How a part color is defined in the LDraw file format The part number is the second number in a part line, after the line type For more details, read the LDraw file format specifications (URL)