Heat transfer colors refer to the dyes, inks, and pigments used in processes like sublimation, heat transfer vinyl, and iron-on printing to apply designs onto fabrics and other surfaces with heat and pressure. The color starts on a transfer paper or film and bonds to the material when heated, creating a durable, wash-resistant image that won’t crack or peel easily. Different methods require specific colorants—sublimation uses dye-based inks that turn to gas and fuse with polyester, while HTV uses solid colored vinyl cut and pressed onto the fabric. The result is vibrant, detailed graphics on t-shirts, mugs, and more.