If you are wanting the slide to be black, I recommend going with Melonite instead of Cerakote.
 
If you would like a Single Color Cerakote applied to your slide, choose this option and type in the specific color you would like in the notes section at checkout. 
 
The Cerakote color we use to match the 19X slide color is H-268 Troy Coyote Tan.
The Cerakote color we use to match the M&P FDE color is H-267 Magpul FDE.
The Cerakote color we use to match the Glock FDE frame color is H-261 Glock FDE
 
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 fore-front 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. For more information please visit the Cerakote Website.