It's usually pretty arbitrary as to what they decide to throw in a foil sticker for. Inexplicable stickers like Alto's visor (seeing a foil sticker for Alto's clear green visor makes me weep), the crotch, Ozma's head sensors, forward nose sensors, the green gunpod sensor, etc.
Took a quick gander at the color sheet (kinda sketchy surfing Hobby Search pages at the office), but here's a few colors (my Japanese is limited)-
Column 1 (first color scan, looks to be the main fuselage colors)
1. wine red 85%, clear blue 10%, clear red 5%, little bit of white
2. wine red 80%, purple (i assume that's what "sumire" is) 10%, clear blue 10%
3. purple 65%, wine red 20%, white 10%, clear red 5%