Zephyr Pink vs Caesar Red

How close are they?

ΔE 15.5, loose: different enough that you should pick on purpose. Caesar Red is a little lighter, more muted, warmer than Zephyr Pink.

Can I use Caesar Red instead of Zephyr Pink?

Not as a straight swap; see the closer alternatives below. Loose match (ΔE 16). Caesar Red is a little lighter, more muted, warmer than Zephyr Pink.

Can I use Zephyr Pink instead of Caesar Red?

The same difference applies the other way round: Zephyr Pink is a little darker, more saturated, 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.