The faded formula is
2 parts anti glare green, which looks to me like chromate green, not interior green
2 parts orange yellow, which to me looks like international orange
1 part roof brown, it’s a dark, rich brown, not as dark as chocolate, not as red as chestnut
The original dark O.D. is, by my interpretation,
2 parts black
2 parts insignia yellow
2 parts chromate green
3 parts primer white
6 parts dark earth
Hope these work for you.