Sapphire Gem vs Teclis Blue

How close are they?

ΔE 8.8, close: similar, with a visible difference side by side. Teclis Blue is a little lighter, more muted, cooler than Sapphire Gem.

Can I use Teclis Blue instead of Sapphire Gem?

Usually, if you are not matching paint already on the model. Close match (ΔE 9). Teclis Blue is a little lighter, more muted, cooler than Sapphire Gem.

Can I use Sapphire Gem instead of Teclis Blue?

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