Because of the different qualities of the color control hair color is different, then how choose the right hair color it? Hair color changes may be made in ps, and ultimately to choose their own favorite hair color. How we should operate it? Ps simple way to replace hair color with the use of a look below.
1. Select your own photos dragged ps tool, select a background copy layer, try to ensure that every step create a new layer, easy to modify when this error. 
2. The second step need to create a new blank layer, a new layer above the use. 
3. Select a favorite hair colors, add new layers to operate in. 
4. Select the Brush Tool in the left toolbar applied to the hair, the minimum hardness of modulation, the pixel size appropriately adjusted.
The transparency of the new layer is adjusted, is about 50%. 
6. Place the new layer blending options to select color overlay, after the new law on the show in the user interface yet. Several attempts can choose their favorite colors bleaching and dyeing. 
Ps tool to use hair color to replace method like that shown above, some of the more bright colors can first look at the effect is suitable to themselves during the dyeing, I hope we can bring help.