As i said, most of the camos ( in particular the Two-Done Pattern and the US ones ) can't be exactly historically accurate, because they were Field-Painted Pattern
Also, the colors can be slightly different in the game yes. It's the case for some skins.
Here are some for the US ones :
Dog company Camouflage
Four Color Pattern
-
#Steam AliasWL%Streak
- 1.653231.739+13
- 2.840223.790+3
- 3.35057.860+15
- 4.599234.719+7
- 5.278108.720+29
- 6.927408.694+1
- 7.645.928+5
- 8.306114.729+2
- 9.1123623.643+4
- 10.266140.655+1