Deep Sky Blue vs Aquamarine

How close are they?

ΔE 13.6, fair: the same colour family, but not a straight swap. Aquamarine is much more saturated, warmer than Deep Sky Blue.

Can I use Aquamarine instead of Deep Sky Blue?

Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 14). Aquamarine is much more saturated, warmer than Deep Sky Blue.

Can I use Deep Sky Blue instead of Aquamarine?

The same difference applies the other way round: Deep Sky Blue is much more muted, cooler.

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.