Familiar Pink vs Garnet Purple

How close are they?

ΔE 43.8, loose: different enough that you should pick on purpose. Garnet Purple is noticeably darker, much more muted, cooler than Familiar Pink.

Can I use Garnet Purple instead of Familiar Pink?

Not as a straight swap; see the closer alternatives below. Loose match (ΔE 44). Garnet Purple is noticeably darker, much more muted, cooler than Familiar Pink.

Can I use Familiar Pink instead of Garnet Purple?

The same difference applies the other way round: Familiar Pink is noticeably lighter, much 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.