ΔE 14.5, fair: the same colour family, but not a straight swap. Medium Yellow is a little darker, warmer than Deep Yellow.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 14). Medium Yellow is a little darker, warmer than Deep Yellow.
The same difference applies the other way round: Deep Yellow is a little lighter, 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.
See Deep Yellow on the colour wheel See Medium Yellow on the colour wheel
All matches: Deep Yellow equivalents · Medium Yellow equivalents