Bain chromo riche is the shampoo for coloured hair. Bain de force is also good - for weakened hair so ideal for highlights. (Bain = shampoo.)
The conditioners are the ones which look like the shampoo bottles but upside down. I have highlights and find the Ciment Anti-Usure conditioner (from the Force range) the best. It adds condition and shine but doesn't weigh the hair down too much.
The Aqua-Oleum treatments from the Nutritive range are also really good. I use them once a week and they keep my hair in really good condition despite the fact that I've had highlights for about the last 15 years.
If it's for coloured hair, you want the reflection one - it's dark pink. They have several types of conditioner for differing levels of damage to your hair. the shampoo is called "bath" and the conditioner I use is called a "masque" - they are v up their own arses with their names!