Can I use clarifying shampoo on my colour?
A) I would definitely advise you not to use bicarb soda or vinegar. While these will remove product build-up, they will also completely strip the liveliness from your hair colour, leaving it dull and without richness. Clarifying shampoos can be used on coloured hair and won't act as a stripping agent, however, if you are looking to maintain your colour, you can't go past a weekly colour treatment. It will lock in the vibrancy of your salon colour and will also work to facilitate the removal of product.
– Hairdresser, Alan Coban