for just the right dimensional color? Kadus Fervidol Brilliant imparts color, shine and condition in one tube. During the highlighting process your stylist can apply Fervidol Brilliant in between foils or after to intensify and perfect your color. The natural emollients and proteins in Fervidol Brilliant are the secret to the long lasting hue and sheen. Because Fervidol Brilliant is formulated to fade out naturally in 4-6 weeks, you can change it up every appointment.