Cyan vs Aquamarine

How close are they?

ΔE 10.3, fair: the same colour family, but not a straight swap. Aquamarine is a little darker, warmer than Cyan.

Can I use Aquamarine instead of Cyan?

Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 10). Aquamarine is a little darker, warmer than Cyan.

Can I use Cyan instead of Aquamarine?

The same difference applies the other way round: Cyan is a little lighter, 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.