Dyes For Coolant Antifreeze SKU: SKU RXSOL-27-1001-001 Product Category: Category Coolant Glycol Antifreeze-27 Variations Dyes For Coolant Antifreeze Short Description Short Description Typically, OAT antifreeze contains an orange dye to differentiate it from the conventional glycol-based coolants (green or yellow), though some OAT products may contain a red or mauve dye.