If you do not have an AMS, change the (change filament) portion on the right once you slice it,.. to pause print. Then manually chance colors for multicolor. If you do have an AMS, do the following.

Print at 100% infill with a layer height of 0.08mm with a base layer of 0.16mm

Filaments Used:
PLA BambuLab Matte Charcoal Transmission Distance: 1.6
PLA BambuLab Matte Mandarin Orange Transmission Distance: 2.6

Swap Instructions:
Start with Charcoal
At layer #18 (1.52mm) swap to Mandarin Orange for the rest.