Cinnamon Try a cinnamon hair mask to change hair color at home. Mix a tsp of cinnamon with enough water to make a paste. Apply your favorite conditioner thoroughly to wet hair and leave it on. Apply the cinnamon-water mixture to your strands, the conditioner will help the cinnamon blend stick better. Wrap a shower cap around your strands, then leave the mixture on for at least six hours. Rinse it off, and enjoy a lighter, brighter hair.