Morrow Purple vs Iceberg Grey

How close are they?

ΔE 22.3, loose: different enough that you should pick on purpose. Iceberg Grey is noticeably darker, more muted, cooler than Morrow Purple.

Can I use Iceberg Grey instead of Morrow Purple?

Not as a straight swap; see the closer alternatives below. Loose match (ΔE 22). Iceberg Grey is noticeably darker, more muted, cooler than Morrow Purple.

Can I use Morrow Purple instead of Iceberg Grey?

The same difference applies the other way round: Morrow Purple is noticeably lighter, 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.