Tips on keeping colour-treated hair looking sleek and healthy

All hair dyes fade, whether permanent or not. The culprits are oxidation (unavoidable) and the sun, so your first line of defense is to cover up. (Products that contain sunscreen can help a bit, but they're not enough.) Use a gentle shampoo, then condition as much as possible without making your hair go limp. Bear in mind that permanent and some semi-permanent dyes may cause damage - some more than others. Between each colouring session, use shampoos containing a colourant, which can help freshen up your look.