Dark Turquoise vs IDF Blue

How close are they?

ΔE 10.6, fair: the same colour family, but not a straight swap. IDF Blue is a little lighter, more muted than Dark Turquoise.

Can I use IDF Blue instead of Dark Turquoise?

Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 11). IDF Blue is a little lighter, more muted than Dark Turquoise.

Can I use Dark Turquoise instead of IDF Blue?

The same difference applies the other way round: Dark Turquoise is a little darker, more saturated.

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.