Color code (as a system for displaying information by using different colors) may refer to:

• Bottled gases
• Color codes in three-phase electric power (electrical wiring)
• Electronic color code
• Web colors for HTML color codes
• 25-pair color code
• Color coding of optical fibers
• Color codes of fire extinguishers
• Hanky code
• Jumper cables
• Traffic lights
• Navigation lights, sea marks and characteristic lights
• Ribbon colors see: Category:Ribbon symbolism
• The Homeland Security Advisory System color code in the United States
• Utility color codes
• ColorCode 3D stereo image system using blue/amber viewing glasses
• Artillery shells and other munitions, which are color coded according to their pyrotechnic contents e.g. white phosphorus, TNT high explosive, mustard gas etc.