Ice Yellow vs Moonray Flesh

How close are they?

ΔE 15.8, loose: different enough that you should pick on purpose. Moonray Flesh is noticeably darker, more muted, warmer than Ice Yellow.

Can I use Moonray Flesh instead of Ice Yellow?

Not as a straight swap; see the closer alternatives below. Loose match (ΔE 16). Moonray Flesh is noticeably darker, more muted, warmer than Ice Yellow.

Can I use Ice Yellow instead of Moonray Flesh?

The same difference applies the other way round: Ice Yellow is noticeably lighter, more saturated, cooler.

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.