ΔE 14.9, fair: the same colour family, but not a straight swap. Cadmium Yellow Medium Hue is a little lighter, cooler than Life Vest Yellow.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 15). Cadmium Yellow Medium Hue is a little lighter, cooler than Life Vest Yellow.
The same difference applies the other way round: Life Vest Yellow 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 Life Vest Yellow on the colour wheel See Cadmium Yellow Medium Hue on the colour wheel
All matches: Life Vest Yellow equivalents · Cadmium Yellow Medium Hue equivalents