Dewpath vs Light Turquois (Phthalo)

How close are they?

ΔE 8.9, close: similar, with a visible difference side by side. Light Turquois (Phthalo) is a little lighter, warmer than Dewpath.

Can I use Light Turquois (Phthalo) instead of Dewpath?

Usually, if you are not matching paint already on the model. Close match (ΔE 9). Light Turquois (Phthalo) is a little lighter, warmer than Dewpath.

Can I use Dewpath instead of Light Turquois (Phthalo)?

The same difference applies the other way round: Dewpath is a little darker, 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.