Try kerastase…chroma reflect….pink bottle, but if you don’t want to pay that much, l’oreal makes a good color shampoo and so does bumble&bumble (with actual color pigment in the shampoo and conditioner to keep color longer!). redken also makes a decent one.
do not use cheap shampoo! i can’t say it enough. it will just strip your hair. especially don’t use daily shampoo because it’s the harshest.
always use conditioner to lock color in and close the hair shaft.
also, try to not wash your hair every day. hair powder helps in so many ways! bumble&bumble sells a colored hair powder, so it hides roots (so you don’t need to color so often) and the powder soaks up some of the oil, keeping it from looking gross.