Original mod:

https://mods.factorio.com/mod/CustomCircuitColors
https://github.com/oorzkws/factorio-customcircuitcolors
https://mods.factorio.com/user/_-_-_

I just wanted to test this in 2.0 so I fixed what was breaking.
Let me know if there is anything else bugged with it.

known issues:

• Calls wires red and green still
• Doesn't account for new combinator GUI: "R" and "G" checkboxes, red and green background inputs section
• Quick make wire icons not recolored
• possibly more

I may merge this with my other mod, which has addressed the new GUI.
https://mods.factorio.com/mod/ColorblindCircuitNetwork