Turquoise Green vs Hazardous Smog

How close are they?

ΔE 7.9, close: similar, with a visible difference side by side. Hazardous Smog is a little lighter than Turquoise Green.

Can I use Hazardous Smog instead of Turquoise Green?

Usually, if you are not matching paint already on the model. Close match (ΔE 8). Hazardous Smog is a little lighter than Turquoise Green.

Can I use Turquoise Green instead of Hazardous Smog?

The same difference applies the other way round: Turquoise Green is a little darker.

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.