Ultherapy has been considered "color blind" and in fact performed safely on many patients. However, I will often not use the more shallow, 1.5mm. transducer, on patients who may be prone to post inflammatory hyperpigmentation or melasma skin darkening, as this superficial energy compared to the deeper 3 and 4.5mm. transducers, tends to leave temporary swellings or welts for a few hours or days. I am concerned that although most patients won't develop any skin darkening with such reactions, there will be some who may if the 1.5 mm. transducer is used.The information provided in Dr. Shelton's answer is for educational purposes only and is not intended to constitute medical advice. The information provided should not be relied upon as a substitute for consultations with a qualified health professional who may be familiar with your individual medical needs.