Everything you need to formulate color on extensions with precision and confidence.
The Pro Color System Formulation Guide is built for licensed stylists who want to take the guesswork out of coloring extensions. It covers levels, tones, product selection, and processing considerations specific to extension hair — because color on extensions behaves differently than on natural hair, and that difference matters. Whether you're matching a natural base or working through a multi-step color process, this guide gives you the technical foundation to deliver consistent, professional results every time.
Download the Pro Color System Formulation Guide and keep it in your toolkit.