Inner Light vs Nickel Azo Yellow

How close are they?

ΔE 13.8, fair: the same colour family, but not a straight swap. Nickel Azo Yellow is noticeably darker, more saturated than Inner Light.

Can I use Nickel Azo Yellow instead of Inner Light?

Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 14). Nickel Azo Yellow is noticeably darker, more saturated than Inner Light.

Can I use Inner Light instead of Nickel Azo Yellow?

The same difference applies the other way round: Inner Light is noticeably lighter, more muted.

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.