i selected the mother-child, colored it by making a new layer & fill the selection, than changed the blending mode
step 5 of 17
i selected the hair & changed it's color by making another layer, adding the color & changing its blending mode
step 6 of 17
changed the hair color again by duplicating the 1st colored layer & changing its blending mode again & deleting some parts of it to give it a highlight ;)
step 7 of 17
i added the hair lock by cutting some of the hair & changing it a little