Question Repaint texture based on a specific source color leaving artifacts

Hi guys, I'm trying to reverse engineer a shader for learning purposes and that said shader should be able to take a texture with a specific color (green) and change it to whatever else. I could get it working but for some textures it doesn't behave so well on the masking part and I can see some artifacts on the final mesh

I've noticed the source materials have 10 color properties:

Spoiler: Color properties

• AlphaBody
• ChangeColor
• ColorBack
• ColorControl
• ColorParam
• HighColor
• LightMapColor
• LowColor
• LumiColor
• Param

The input textures are all something like this, with the same shade of green:


I've noticed that the materials have the _ColorControl color set to some shade of pink/magenta so I tried:

1. Color Masking that _ColorControl with the _MainTex
2. Replacing Color from Black to a Blend between _HighColor and _LowColor
3. I multiply the result of Replace Color with the original texture

The problem I've noticed is some textures leaving some artifacts and using the _ColorControl doesnt seem to help in this case...

Spoiler: Result

I'm out of ideas and I my shader knowledge is little to none. Could you point me in the right direction?

 

I think I've got it working but the colors seem a bit too dark... Got it working this way