Deep Cyan vs Plasma Coil Glow

How close are they?

ΔE 9.2, close: similar, with a visible difference side by side. Plasma Coil Glow is more muted, cooler than Deep Cyan.

Can I use Plasma Coil Glow instead of Deep Cyan?

Usually, if you are not matching paint already on the model. Close match (ΔE 9). Plasma Coil Glow is more muted, cooler than Deep Cyan.

Can I use Deep Cyan instead of Plasma Coil Glow?

The same difference applies the other way round: Deep Cyan is 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.