The petals are pink on a white base on the back, except for the synsepal which is light green. The dorsal is pink on the back.
Curiously, this flower is very different from the previous one which was all pink with a less intense colour saturation of the lip as the photo below shows. Note also the transparency of the petals. It seems this plant has not yet made up its mind about colour and substance.
This is a second flowering and the plant is still a bit small. it will be interesting to see what happens next.