The problem with what you're asking for is that all weapons have an inherent sight "color" that's given to them when you look down the sights. I know you say you're a coder but to make a function swap is really not a simple fix and in fact would take a good amount of visual overhaul work to even properly implement it. Maybe in the future they'll add this to D3 but it sure isn't going to be in D2.
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If they implement a proper color blind mode in this game or the next, ill ditch the static dot. Though, right now regardless of what the reason is, the game "does not" have a color blind mode, which puts a really unfair disadvantage on people with color blindness. Im not hear to argue and say what and why something is easy [u]im here to give a band aid to a problem[/u]