If you want to look different with your hair color, let’s try the peek a boo hair color trend which is really popular on Instagram. Peek-a-boo hair means a different hair color between the outside of the hair and the inside of the hair. Usually, the outer part of the hair is black, brown, or blonde. The inside of the hair has a variety of colors that contrast with the color of the outside of the hair. You are free to use any color for the outside and the inside of your hair. But it’s better to use contrasting colors to make it look unique, huh! Here are 50+ Best Peek A Boo Hair Color Ideas