SR5 page 453: "Cybereyes are available in any shape or color, from “almost natural” to all chrome to solid glowing purple and everything in between. Some models have their color and pattern easily altered by downloading a new skin."
In the movie The Last Action Hero, the villain (Mr. Benedict, played by Charles Vance) had a missing eye, and a collection of different glass eyes to fit the socket. He had one with a crosshair pattern, a vertical cat's eye pupil, an eight-ball, even a smiley face, and he changed them frequently. Street samurai can do the same thing, even more easily. Not only can a cybereye look like whatever you want it to, you can also change its appearance on the fly ... [blink] blank chrome for business, [blink] ordinary brown irises for blending in, [blink] neon blue for clubbing, and so on.
* Lots of gear comes with color-changing coatings that can be controlled wirelessly. See also the Fichetti Tiffani Needler (p.425), concealable holster (p.431), electrochromic clothing (p.437), etc.