ΔE 7.6, close: similar, with a visible difference side by side. Park Green Flat is more muted than Seawater.
Usually, if you are not matching paint already on the model. Close match (ΔE 8). Park Green Flat is more muted than Seawater.
The same difference applies the other way round: Seawater is 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 Seawater on the colour wheel See Park Green Flat on the colour wheel
All matches: Seawater equivalents · Park Green Flat equivalents