ΔE 13.1, fair: the same colour family, but not a straight swap. Skin Tone is a little darker, more saturated, cooler than Titan Mars Pale.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 13). Skin Tone is a little darker, more saturated, cooler than Titan Mars Pale.
The same difference applies the other way round: Titan Mars Pale is a little lighter, more muted, 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.
See Titan Mars Pale on the colour wheel See Skin Tone on the colour wheel
All matches: Titan Mars Pale equivalents · Skin Tone equivalents