I've never hesitated to tell people that my hair color comes out of a bottle. This is part of my personal rebellion against the stereotype that certain types of appearance-enhancement (e.g. sexy clothes, makeup, push-up bras) are virtually demanded of women while other types (such as dyeing one's hair) are considered somehow shameful. If it's okay for me to paint my fingernails, then it's equally okay for me to change my hair color.