ΔE 9.7, close: similar, with a visible difference side by side. Rosy Flesh is a little lighter, cooler than Celestine Skin.
Usually, if you are not matching paint already on the model. Close match (ΔE 10). Rosy Flesh is a little lighter, cooler than Celestine Skin.
The same difference applies the other way round: Celestine Skin 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.
See Celestine Skin on the colour wheel See Rosy Flesh on the colour wheel
All matches: Celestine Skin equivalents · Rosy Flesh equivalents