Deepkin Flesh vs Titan Green Pale

How close are they?

ΔE 18.5, loose: different enough that you should pick on purpose. Titan Green Pale is a little lighter, cooler than Deepkin Flesh.

Can I use Titan Green Pale instead of Deepkin Flesh?

Not as a straight swap; see the closer alternatives below. Loose match (ΔE 18). Titan Green Pale is a little lighter, cooler than Deepkin Flesh.

Can I use Deepkin Flesh instead of Titan Green Pale?

The same difference applies the other way round: Deepkin Flesh is a little darker, 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.