Hidden rainbow hair, also known as peekaboo hair, is a hair coloring technique that involves hiding vibrant rainbow colors underneath a layer of natural hair. It's a subtle yet eye-catching way to add a pop of color to one's look.
This technique has gained popularity due to its versatility and low-maintenance nature. The hidden colors can be revealed by styling the hair in different ways, such as braiding or pulling it up into a ponytail. Additionally, the technique has roots in the 1990s when hair chalk and temporary hair dye were used to create colorful streaks.