Grooves are formed on an exterior surface of a component. The grooves are formed proximate to one another such that the grooves diffract light. The exterior surface is processed to reduce the sharpness of peaks between the grooves, reduce differences between the peaks and valleys of the grooves, and/or roughen the grooves. The processing reduces diffraction caused by the grooves such that light reflected from the grooves is not substantially color-shifted (e.g., is or is near the color of the reflecting surface). In various implementations, the processing may include dry blasting, etching, abrasive blasting, burnishing, grinding, ablation, an/or any other process capable of reducing the sharpness, reducing the differences, and/or roughening the surface. In implementations where dry blasting is used, the dry blasting may use ceramic beads as a blast material.