It's great to have several people contributing different styles/colors, since a reticle is a highly personal 'taste', and will only increase the enjoyment of the game, especially for those of us who have been squinting at a monitor for 20+ years. I'll look forward to the dev's implementation of colorizing crosshairs, but have seen such quality crosshair work in other games, that I agree this should be an allowed area for ongoing community contribution, and not strictly for in-game monetization. I don't see this as a cheat or hack, as it is only providing the visibility that should be there in a functional UI/HUD. This work great! It's unobtrusive, and allows me to find my aim, which was practically impossible with the low-contrast stock reticle. I couldn't see the stock reticle at all, and needed some kind of visual reference to center my fire.
This overlay makes a massive difference in visibility for me. New player here, and just wanted to post an OMGTYVM to Umbre for posting this method, and all you who have contributed to this thread.