Yes, the channels are identified by their primary wavelength – 615 nm, 525 nm, and 465 nm. The color of the traces on the graphs correspond to the colors that are detected:
615 nm – red
525 nm – green
465 nm – blue
Interestingly, the color of traces in Graphical Analysis are designed so that people who are color blind are better able to distinguish the colors of the traces as different from one another.