So Boost

SoBoost

SOBOOST are shades that can be mixed with the SoColor and ColorSync Collections to create soft pastel tones or applied full strength to pre-lightened hair for bold, vivid effects. All are intermixable for an endless variety of shade results. 


Blue: Ideal for neutralizing unwanted brassiness and warmth when lifting hair; and for adding cool tones to dark hair. 
Red: A go-to for intensifying red, red-violet and violet formulas.
Copper: Boost vibrancy in auburns, warm browns and golden blondes.
Yellow: An excellent solution for brightening brunettes and softening a too-strong red.

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