Clear Plum vs Ink Blue

How close are they?

ΔE 31.2, loose: different enough that you should pick on purpose. Ink Blue is a little lighter, more muted, cooler than Clear Plum.

Can I use Ink Blue instead of Clear Plum?

Not as a straight swap; see the closer alternatives below. Loose match (ΔE 31). Ink Blue is a little lighter, more muted, cooler than Clear Plum.

Can I use Clear Plum instead of Ink Blue?

The same difference applies the other way round: Clear Plum is a little darker, 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.