If you are asking about Cerakote "Cerakote is a ceramic based finish that can be applied to metals, plastics, polymers and wood. The unique formulation used for Cerakote ceramic coating enhances a number of physical performance properties including abrasion/wear resistance, corrosion resistance, chemical resistance, impact strength, and hardness.
Each of these properties is rigorously tested to guarantee that Cerakote products remain at the foreforont of the ceramic coatings market. Cerakote ceramic coatings utilize state-of-the-art technology to out-perform any competitive coating in both laboratory settings and real world applications."

Barry, Cerakote is a baked on ceramic coating. It can be any color. On this pistol it is black cerakote,

its a Black Cerakote finish see ******TALO Distributor Exclusive
Model Number: 5779 Caliber: 357 Mag
GripsBlack Rubber, Black Synthetic
Front SightBlack Ramp
Barrel Length2.25"
MaterialStainless Steel
Capacity5
Rear SightIntegral
Twist1:16" RH
*******FinishBlack Cerakote
Overall Length7.20"
Weight26 oz.
Grooves5
Cushioned rubber grip with black synthetic or hardwood insert has no exposed metal in the backstrap, making it extremely comfortable.
Takedown of integrated subassemblies requires no special tools, allowing for easy maintenance and re-assembly.
Transfer bar mechanism provides an unparalleled measure of security against accidental discharge.
Grip frame easily accommodates a variety of custom grips.
Triple-locking cylinder is locked into the frame at the front, rear and bottom for more positive alignment and dependable operation shot after shot. https://ruger.com/products/sp101/specSheets/5779.html