The color result of any henna application will be highly individualistic due to differences in base hair color, thickness and texture. An important henna dyeing tip is to always select a shade lighter than the color your are hoping to achieve, especially if you’ve never done henna before. As an example, if you wanted dark brown hair, then the best color to start with is medium brown henna. The reason for this is because you can always go darker with multiple applications; you can’t, however, go lighter.
In order to achieve the desired shade more than one application may be needed. You must wait 72 hours between each application to allow the Henna to oxidize in your hair and become it's true color.