What ERV says is that out of those 8 pads, Pads 2,5,6,7,8 are PWM's.. Pads 1,3,4 are Hi/Low pads..
You may chose to match every pads to the blade color (color parameter) or Xtal color (xcolour parameter) but only 2,5,6,7,8 will be able to reflect the voltage needed to effectively match the color of each die (R,G and B)