In colored hair whether it s been colored at a salon or at home unwanted warm tones can emerge in the aftermath of processing. Once you ve figured out which camp you fall into you can more effectively combat your brassy strands. How To Prevent Brassy Hair Brassy Hair Tone Orange Hair Hair When you bleach or lighten your hair the warm tones from your natural color have a tendency to come out. Brassy hair . Brassiness refers to the unwanted warm tones that show up in colored hair. What is brassy hair. The biggest culprit of brassy hair is lightening dark hair because darker hair naturally contains more warm tones. What does it mean to have brassy hair. Brassy hair happens to the best of us so let s discuss. The smallest pigments which just so happens to be in the blue spectrum fade the fastest leaving lots of red and yellow. Why brassy hair happens. Brassy hair is hair that looks yellowish or orange. It typically happens in dark hair that gets dyed platinum or blond