Quote: --- Original message by: Spartan314
Yeah it's possible
e.g. If you look into the shaders of a weapon tag you should see colored boxes.
I forget which one controls what aspect of color but it should say.
Click on em and choose desired color.
Save shader, recompile and test.

Quote: --- Original message by: Enzo03

Yes, alpha channels help determine where the color changes, but I would like to elaborate:
Alpha modulates color change by how much white there is in a pixel of the texture.
Areas where the alpha is white will have full color change, or at least as much as much as the blue/red channels allow. Black will have no color change. Grey will have color change in between white and black.