If you’re looking for plant-based dyes that will leave your hair lustrous without damaging your follicles (or the Earth), check out these products for vibrant, eco-friendly colour. The key to finding a “healthy hair dye” is to avoid both ammonia and parabens, two damaging ingredients that are slowly being phased out of most beauty products.

Many plant-based dyes use henna to colour the hair, while others use a mixture of plant extracts and seed oils to achieve colour nirvana. Both are viable and eco-friendly options, suitable for almost all hair types.

However, if you choose a henna-based dye, remember that henna does not wash out and acts as a varnish over your natural hair colour. This means that you cannot switch to a synthetic colour in the future without a lot of hassle, so if you go dark, be ready to keep that shade for a while.