If you want to add color to your Oklahoma TPO roof, maybe make a compelling statement or even place your company logo on your commercial building roof, you can do it with TPO roofing products from GAF and Mule-Hide.
GAF has standard colors, pre-formulated colors, and a huge selection of custom colors. On their website, they state that no other single-ply or metal roofing manufacturer offers more color choices than they do. (Here is their article: http://www.gaf.com/Roofing/Commercial/Products/Single_Ply_Roofing/EverGuard_TPO_Single_Ply_Membranes ) Additionally, most colors come with their reflective and energy cost reducing "Cool Color" technology. Add to this, special pigment to reduce fading, and you can have a roof top that is highly personalized. Custom order matching roofing system accessories are also available.
Their TPO roofing accessories and components include an extensive line of flashing accessories which are heat welded to their roofing membrane. These work well in Oklahoma for Oklahoma commercial roofs. The stnadard colors for their flashing accessories are usually white, gray, and tan.