Duplicate picture layer > Make a new layer and fill with the color for the hair > Mask button and Ctrl + i and use brush color white to make hair color appear > Merge down layer
step 3 of 13
Right click the mask, not the picture and select > Apply layer mask
step 4 of 13
Use Polygonal Lasso Tool feather 5px to remove unwanted parts > You can stop here and you have colored the hair
step 5 of 13
Select a part of the hair where it look nice with your Polygonal Lasso Tool
step 6 of 13
Duplicate as many as you need > Ctrl + t to transform and make it fit so it look nice
step 7 of 13
Use Polygonal Lasso Tool to look neat > You can stop here and have a pretty looking hairdo or make more
step 8 of 13
Use the Smudge Tool > in color mouse down and short
pull out > do different directions or it will look wrong
step 9 of 13
Next step you have to be very creative > Use the Polygonal Lasso Tool and make it look neat > You may have to Smudge and cut many times to make it look natural
step 10 of 13
I leave it like this, it is not the best but gives an idear
step 11 of 13
Make new layer and use brush tool and different colors in the hair