ΔE 15.8, loose: different enough that you should pick on purpose. Hay Color is noticeably darker, warmer than Ogryn Camo.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 16). Hay Color is noticeably darker, warmer than Ogryn Camo.
The same difference applies the other way round: Ogryn Camo is noticeably lighter, cooler.
ΔE is the colour difference between our two swatch estimates: under about 6 is close, over about 15 is loose. Real paints also differ in finish, coverage and how they thin, so test before you commit.
See Ogryn Camo on the colour wheel See Hay Color on the colour wheel
All matches: Ogryn Camo equivalents · Hay Color equivalents