For the pick guard base part you can print with any color you would like then just follow the rest of the layer swaps as follow from layer 16 (2.56mm)

Print at 100% infill with a layer height of 0.04mm with a base layer of 0.16mm

Filaments Used:
PLA+ IIID Max Black Transmission Distance: 0.2
PLA+ IIID MAX Apple Green Transmission Distance: 2.5
PLA+ GST3D White Transmission Distance: 5.8
PLA PolyLite Orange Transmission Distance: 7.5

Swap Instructions:
Start with Black At layer #16
At layer #31 swap to Apple Green
At layer #40 swap to White
At layer #50 swap to Orange for the rest.