My medium is Faber-Castell watercolour 36 set. I would love to share the way I colored the hair. I wrote description in each photo, hope this could help you.
1.My medium: Faber-Castell watercolour 36 set. I used 476, 480, 499, and 401 for the hair color.
2. Color the 1st layer with 476 gently, leave the center as the light shining part.
3. Color the 2nd layer and harder with 476 again, from the upper part to the bottom. Still leave the center with white.
4.Color the 3rd layer with 480. As you can see the color layer has 3 parts: the 1 colored with 476 gently, 2 colored with 476 harder again, 3 colored with 480.
5.Color the 3 parts in the picture with black #499, this will make your hair look more natural.
6.Color with white 401 to cover the layer lines and make the shining part more vividly.
7.Use colorless pencil to blend the layer lines.
8. Blend the layer.
9. Finish.
For those who are asking about the picture, it's from "Magical fairy-tale trip with Sorssora". The artist is Park, HyunJin.