You’ll definitely need to bleach your hair to get your desired color. Here is a comprehensive FAQ video about pink hair from a well-known YouTuber. It includes information about coloring brands, bleach, fading, and retouching.
The principles of bleaching and coloring unlocked hair and locked hair are essentially the same, but here is a comprehensive guide about coloring locks by Lish Daelnar if you’d like some step-by-step assurance.
Of course, whenever you’re in doubt, visit a hair care professional. They will be able to take you through the process as safely as possible.
Followers: Any other tips for bleaching/coloring dark locks to a pastel color?