I've been painting pistol sights for years, starting with my first duty gun. Some guns with stainless steel front sight blades were blackened, others got a dab of red fingernail polish on the top of the rear face for faster pickup. My favorite bowling pin gun has a whitened rear sight and a black front for better contrast. The best part is, if your needs change or you decide you don't like the color, you can take it off in a few minutes!
And the older I get, the more my eyes need help picking up the sights, especially in low light! :shock:
Papajohn the Pistol Polish Painter