ΔE 14.7, fair: the same colour family, but not a straight swap. Fluor Yellow is a little darker, much more muted than Neon Yellow.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 15). Fluor Yellow is a little darker, much more muted than Neon Yellow.
The same difference applies the other way round: Neon Yellow is a little lighter, much more saturated.
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 Neon Yellow on the colour wheel See Fluor Yellow on the colour wheel
All matches: Neon Yellow equivalents · Fluor Yellow equivalents