how to get this ash brown? what color number and developer?

[taaraa]

 

[Dalylah]

No idea myself. It would probably also depend on what color your hair is naturally too. I would take this picture to a salon for best results.

 

[Carla Minaj]

Looks about a 6a to me, but thats depending on the brand of color you use. As far as formula would depend on your natural haircolor as well as the processed color you may already have!