How do you get a glow map to change color with a variable?

Hi I am trying to have a colorable neon lights to my mod. I can have the spotlights change color with the variable but the glow map does not. it just remains white. I know you can do this with an html texture but can't figure out how to get this to work. I am borrowing files with permission from the Gavril Vertex. I have copied all files related to the neon to my mod renamed it. But when I do this it does not work even though the same files work for the vertex. I have triple checked that when I renamed the files that the format matches. but it still doesn't work. What am I doing wrong?