Abstract: A system and method for customizing the solution used in the sunless spray tanning process are provided. In at least one form, the solution is volumetrically mixed at the point of use, allowing for greater customization and a more consistent tanning result. Providing improved customization at the point of use is accomplished, in at least one form, by using a two-part tanning solution: one part being a high concentration DHA solution and another part being an activator solution. The two parts are mixed with one another at the point of use based on user preferences at the time of the tanning session to provide a specific final DHA concentration for a customized tanning result.