Golden Griffon vs Honey Moon Yellow

How close are they?

ΔE 16.0, loose: different enough that you should pick on purpose. Honey Moon Yellow is a little lighter, much more saturated than Golden Griffon.

Can I use Honey Moon Yellow instead of Golden Griffon?

Not as a straight swap; see the closer alternatives below. Loose match (ΔE 16). Honey Moon Yellow is a little lighter, much more saturated than Golden Griffon.

Can I use Golden Griffon instead of Honey Moon Yellow?

The same difference applies the other way round: Golden Griffon is a little darker, much 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.