There are many options for the different makes and models. Depending on your vehicle it is possible to clear out the lights (remove any amber) and or black them out (as long as there is no effect on light projection. First the lights have all important hardware removed and the lights are separated. After the lenses are removed, the painted areas are prepped and then painted. There are a variety of colors to choose from (such as flat black, gloss or semi-gloss black, gunmetal, silver or any other desired color). Once completed, the lights are reheated and sealed back together with a lifetime warranty sealant.
Examples of some makes and models available for modification:
(Click manufacturer name for link to photos)