What spray-tan to use on medium skin tone? Naked Tan recommends using the Exotic solution with 12% DHA for a green-based colour, up to 4 shades darker.All our solutions are made with a combination of the most natural tanning ingredients and contain no nanoparticles, no parabens, no SLS sulphates and no alcohol. Exotic solution provides a gorgeous deep exotic bronze. Ashed based tan. Fast-drying formula. Will achieve a tan 5 shades darker. Wash n wear in only 2 hours.