ΔE 26.6, loose: different enough that you should pick on purpose. Dark Green Blue is a little darker, much more muted than Leviadon Blue.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 27). Dark Green Blue is a little darker, much more muted than Leviadon Blue.
The same difference applies the other way round: Leviadon Blue is a little lighter, much more saturated.
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 Leviadon Blue on the colour wheel See Dark Green Blue on the colour wheel
All matches: Leviadon Blue equivalents · Dark Green Blue equivalents