Pink Flesh vs Elder Flower

How close are they?

ΔE 6.6, close: similar, with a visible difference side by side. Elder Flower is a little darker, more saturated than Pink Flesh.

Can I use Elder Flower instead of Pink Flesh?

Usually, if you are not matching paint already on the model. Close match (ΔE 7). Elder Flower is a little darker, more saturated than Pink Flesh.

Can I use Pink Flesh instead of Elder Flower?

The same difference applies the other way round: Pink Flesh is a little lighter, more muted.

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.