Spectral Blue vs Hydra Turquoise

How close are they?

ΔE 12.3, fair: the same colour family, but not a straight swap. Hydra Turquoise is a little darker, more saturated, cooler than Spectral Blue.

Can I use Hydra Turquoise instead of Spectral Blue?

Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 12). Hydra Turquoise is a little darker, more saturated, cooler than Spectral Blue.

Can I use Spectral Blue instead of Hydra Turquoise?

The same difference applies the other way round: Spectral Blue is a little lighter, more muted, 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.