Add water. Before you rinse out the color, sprinkle a little water on your head and mush your hair around with your hands for a few seconds. "It emulsifies the dye and moves it all around so you don't end up with any lines or streaks," says Ionato. Tweak the results : After your hair is dry, if you're unhappy with the color, you can mute it by applying a deep conditioner to damp hair. Then cover your head with plastic wrap and a hot, damp towel. Leave on for 20 minutes (at ten minutes, blast your head with a blow_dryer), then shampoo and condition your hair. If you're still not happy with your shade, well, it looks like you're heading to the salon.
Similar to Hair Color, the Hair Color Booth app lets you experiment with your hair colour in crazy shades. You can also select just some of your hair to try different colour streaks or ombre colour combinations. This is a great app to freak out your mum or friends too! There's only a few colours in the free version but it's enough to try some rainbow hair.