Cold Pink vs Lucius Lilac

How close are they?

ΔE 15.1, loose: different enough that you should pick on purpose. Lucius Lilac is a little darker, more muted, cooler than Cold Pink.

Can I use Lucius Lilac instead of Cold Pink?

Not as a straight swap; see the closer alternatives below. Loose match (ΔE 15). Lucius Lilac is a little darker, more muted, cooler than Cold Pink.

Can I use Cold Pink instead of Lucius Lilac?

The same difference applies the other way round: Cold Pink is a little 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.