John Frieda Brilliant Brunette® Visibly Deeper Conditioner, $17.99.

If you go to the trouble of colouring your hair then it only makes sense to put some effort into maintaining your gorgeous hue for as long as possible. This excellent range (comes with a shampoo too of course) deepens brunette tones for all-over, uniform colour. It also creates mirror-like shine to enhance that rich, luxe look. NB: Don’t panic – there’s products for blondes and redheads too.