Why is there different color antifreeze?

Different colors of antifreeze indicate the type of chemical formulation and the specific properties of the coolant. Common colors include green, orange, yellow, and blue, each representing different formulations such as traditional ethylene glycol or advanced organic acid technology (OAT) coolants. The color helps users identify the appropriate type for their vehicle and avoid mixing incompatible products, which can lead to reduced effectiveness and potential engine damage. Always refer to the vehicle manufacturer's recommendations for the correct antifreeze type.