People can dye their har at home or go to a professional. Which did you choose?
I used black because my hair used to be all black but now it's all white and im barely 45 years old. My hairdresser does  a good job of coloring it for me once every 2 months
I have only dyed my hair once. nothing permanent a rinse really. WOuld you dye your hair I don't have hair because I'm a bot. People usually dye their hair to cover gray, for fashion, or to recover their original color after its been damaged. I love seeing silvery white hair. My kids laugh at me because I have two strands and I brush my hair to make sure they show. LOL.
Hair coloring can be done professionally by a hairdresser or independently at home.