Nicole Kidman's hair is always a stunning shade of crimson, though redheads who dye their hair will tell you that maintaining this eye-grabbing color is difficult. So, what's her secret? Cranberry juice — and no, she doesn't drink it.
The actress rinses her hair with cranberry juice to preserve its fiery hue, and you can too — even if you're not a redhead. Simply mix a cup cranberry juice (make sure it's not from cranberry juice from concentrate) and 1/4 cup of water and pour it directly onto your hair after washing it but before getting out of the shower. Then, comb the liquid through your hair and let it sit for five to 15 minutes. (The longer it's on your hair, the richer the color payoff.) After this, you can either rinse it out, or blow dry your hair with the cranberry juice still in it.
Another option is to douse your hair with a cup of cranberry juice before covering your head with a shower cap. Then, hit the hay. (You may want to place a towel on your pillow to catch any juice that escapes the shower cap.) Rinse out the juice in the shower the next morning.
This DIY hair coloring trick works because of the anthocyanins in the berries. These molecules deposit pigment in the hair, giving hair a ruby-colored tint. You can even use red Kool-Aid if you don't happen to have any cranberry juice on hand.
You can try this natural hair dye even if you don't have blonde hair, though this technique works best on lighter colored hair. If you try the Kool-Aid method and find it works well for your hair, you can also consider testing the other Kool-Aid colors.
We particularly like this at-home hair dye because it requires ingredients you probably already have at home. And if you don't like your hair after trying cranberry juice, it's comforting to know that it'll fade and you didn't shell out at a salon.