Debugged and found a hardware issue. On my lpc43s37 lpcxpresso board and found that the signals are correct to the RGB LED but the RGB LED chip mounted on the board does not have correct pin out. Blue and Green LED light as expected as long as the RED led PIN #1 set high. But as soon as PIN #1 is brought low both Blue and green LED turn off. PIN #1 should be tied to Power and Red led should be pin #2 on the RGB led chip. This is a common pin out of RGB led chips. http://www.kingbrightusa.com/images/catalog/SPEC/AAA3528BGRS-129-C3.pdf The RED led pin #1 is providing the 3.3 volts to the anode of all 3 LEDs. The schematic shows that the RGB LED is this one http://www.wenrun.com/uploads/soft/150325/11-150325150134.pdf but the circuit behaves like the AAA3528BGRS-129-C3 is mounted on the board. Using a multimeter showed that when all led pins are set low ( #3,#4,#1) all leds are off which should not be the case if the correct LED is installed. Verified on another LPC43S37 the same behavior.
Conclude that it is impossible to light the Red LED of the RGB led without a modification of the hardware. Which would be replace the RGB Led with the one specified in the schematic or re route the PCB to match the RGB led that is installed on the board.