I think you might be looking in the wrong places.
If you look at a talk group in EZScan you'll see LED colors. click on that and you'll see the hex codes.
The colors for this are used in the alert light on the scanner. When the TG gets active the light are turned on in the color and blink pattern that you set, both in EZScan and in the scanners own setting. It has nothing to do with the color code for the transmission.
/Ubbe