Cinnamon can be used for a natural hair discoloration. Don't expect to see results overnight because you need to use a cinnamon based mask at least 3 times to lighten your color.
First procedure: Mix 4 tablespoons of cinnamon with water until you obtain a paste. Apply conditioner on wet hair and let it act for 5 minutes then apply the cinnamon based mask, from root to ends.
Cover your scalp with plastic wrap and let the mask act for 4-5 hours. Wash your hair, rinse it thoroughly and reuse this mask for a few days. You'll notice your hair will turn a lighter shade than the previous one.
Second procedure: You need baking soda, anti-dandruff shampoo and hair conditioner. First, wash your hair with anti-dandruff shampoo. Rinse your hair thoroughly. Mix equal amounts of baking soda and shampoo in a bowl. Use a spoon to obtain a homogeneous mixture.
Gently massage your hair with the obtained paste and let it act for 10 minutes. Rinse your hair and degrease it with anti-dandruff shampoo. Finally, use a conditioner that doesn't require rinsing to make sure your hair is properly hydrated. If the color is not removed from the first wash, repeat this procedure 2 or 3 times within a few days.