This color is called "crushed orchid"  by Apollo Custom who applied the finish. 

Designed for comfort, The G43X combines a compact-size grip length, a built-in beaver tail and

a subcompact-slim slide for a comfortably balanced, versatile grip thats ideal for a variety of users. The frame incorporates elements of the Gen5 and Slimline series such the short trigger distance, a frame with a built-in beavertail, a reversible magazine catch and the incredibly accurate, match-grade GLOCK Marksman Barrel (GMB) and precision-milled front serrations.

a subcompact-slim slide for a comfortably balanced, versatile grip thats ideal for a variety of users. The frame incorporates elements of the Gen5 and Slimline series such the short trigger distance, a frame with a built-in beavertail, a reversible magazine catch and the incredibly accurate, match-grade GLOCK Marksman Barrel (GMB) and precision-milled front serrations.