A method for colouring hair comprising the steps of:
i) providing a first hair colouring composition and a second hair colouring composition, wherein each of the first and second compositions comprises one or more direct dyes and the pH of the second hair colouring composition is lower or higher than the pH of the first hair colouring composition;
ii) applying a portion or all of the first hair colouring composition to a first region of the hair;
iii) applying a portion or all of the second hair colouring composition to a second region of the hair.