In the late and early bright neon hair hues were the most popular non-traditional hair colors. Unlike their predecessors, these modern pastel shades are more versatile and easier to maintain. Pastel purple hair is the top favorite of all the pastels
Source A great example of how you can use bright colors in a subtle way. If you are worried about committing to the look, this is the best time to utilize hair chalk or temporary dye for a quick yet fun color.