Basic Skin Tone vs Ice Yellow

How close are they?

ΔE 9.5, close: similar, with a visible difference side by side. Ice Yellow is a little lighter, cooler than Basic Skin Tone.

Can I use Ice Yellow instead of Basic Skin Tone?

Usually, if you are not matching paint already on the model. Close match (ΔE 10). Ice Yellow is a little lighter, cooler than Basic Skin Tone.

Can I use Basic Skin Tone instead of Ice Yellow?

The same difference applies the other way round: Basic Skin Tone 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.