Your best bet is to go to a salon and have your hair glossed a little darker to cover up the bright color. Keywords you can use: gloss, semi-permanent, tone, tint. If worse comes to worse and you have to purchase something and do-it-yourself make sure to get a semi-permanent hair color. This is going to cover up the bright color while allowing your natural hair to grow out softly. Follow up with a hydrating treatment once a week to maintain a healthy shiny appearance.