Golden Griffon vs Yellow Flame

How close are they?

ΔE 16.7, loose: different enough that you should pick on purpose. Yellow Flame is a little lighter, warmer than Golden Griffon.

Can I use Yellow Flame instead of Golden Griffon?

Not as a straight swap; see the closer alternatives below. Loose match (ΔE 17). Yellow Flame is a little lighter, warmer than Golden Griffon.

Can I use Golden Griffon instead of Yellow Flame?

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