Blonde underlayer hair 2020 (Noun) is a hairstyle in which the lower layers of hair are dyed a lighter shade than the upper layers, often blonde. A notable example is the "Peekaboo Blonde" style, where the blonde underlayer is revealed when the top layers are pulled back.
Blonde underlayer hair 2020 gained popularity due to its versatility and flattering effects. It can add depth and dimension to hair, making it appear thicker and healthier. Historically, the trend can be traced back to the "Reverse Ombre" technique of the early 2010s, which involved lightening the lower layers of hair while keeping the roots darker.