The present invention relates to a method of levelling hair colour, especially the hair lighter coloured or including lightened streaks or bleached streaks or bleached as a whole and after certain period of time contrast - difference in colour - between the regrowth and formerly lightened parts is clearly visible. The first objective of the present invention is a method for levelling colour of hair comprising at least two parts wherein one part being the part not closer to scalp which is artificially colour changed to a lighter colour by means of lightening and/or colouring and/or bleaching than the other part closer to scalp which is preferably undamaged and has its natural colour, wherein hair is optionally shampooed and optionally towel dried and the-part directly at the scalp, preferably undamaged and preferably having its natural colour, is applied a composition resulting from mixing two compositions, A and B, prior to application, wherein composition A is an aqueous composition and comprises at least one oxidizing agent and has an acidic pH, preferably between 2 and 5 and composition B is a substantially anhydrous composition and comprises at least one compound with bleaching effect, and composition thus obtained has apH between 8 and 12, and processed for up to 10 min, preferably between 2 and 8 min, more preferably between 2 and 7 min and most preferably between 2 and 5 min (all values are included) at a temperature between 20 and 45°C, preferably at an\ambient temperature and rinsed off from hair and hair is optionally dried.Linvention concerne une composition et un procédé dégalisation de la couleur des cheveux, notamment les cheveux éclaircis ou comportant des mèches éclaircies ou décolorées, ou des cheveux intégralement décolorés présentant, après une certaine période, un contraste/une différence de couleur très visible entre la zone ayant repoussé et les zones éclaircies. Ladite invention concerne en premier lieu un procédé dégalisation de la couleur de
