Matrix Color Sync Demi-Permanent Hair Color Ammonia Free 2 oz (Pick your Shade). What it is: If you’ve never gone Demi, you’re missing out! Matrix ColorSync demi-permanent hair color delivers a rich, reliable result every time! This hair color comes in various hues, like browns, reds, blondes, and pastels! It even comes in a “clear” shade for experimentation. Your next best hair color is here! What it does: This demi-permanent hair dye deposits color molecules on the hair. This dye does not lift the hair because it’s formulated with no ammonia. What else you need to know: Since the color does not penetrate the cortex of your hair, you don’t have to worry about excessive damage due to chemicals. The CERA oil conditioning complex conditions your hair and keeps the color vibrant for an extended amount of time.