ΔE 22.1, loose: different enough that you should pick on purpose. Wagram Blue is a little darker, more saturated than Graphite Green.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 22). Wagram Blue is a little darker, more saturated than Graphite Green.
The same difference applies the other way round: Graphite Green is a little lighter, more muted.
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 Graphite Green on the colour wheel See Wagram Blue on the colour wheel
All matches: Graphite Green equivalents · Wagram Blue equivalents