You can build the equivalent of a color gel filter by using a Blender node set to Color (or  maybe Tint?) blend mode and feeding it a Solid Color input. You can even use the color picker on the LED camera return on a mid gray area that should be neutral to pick the Solid color and then place an Inverter node after the Solid Color node. This should act as a simple white balance filter that also corrects green/magenta. There are of course more layers to this, but I had very interesting results when I tried different variations of this method in Aximmetry. 

Thanks for the solution TwentyStudios, you made my DP very happy! It worked perfectly.