ΔE 27.5, loose: different enough that you should pick on purpose. Tempest Blue Wash is much more muted, cooler than Coelia Greenshade.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 28). Tempest Blue Wash is much more muted, cooler than Coelia Greenshade.
The same difference applies the other way round: Coelia Greenshade is much more saturated, warmer.
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 Coelia Greenshade on the colour wheel See Tempest Blue Wash on the colour wheel
All matches: Coelia Greenshade equivalents · Tempest Blue Wash equivalents