Boone Tan vs Golden Griffon

How close are they?

ΔE 29.1, loose: different enough that you should pick on purpose. Golden Griffon is a little darker, much more saturated, cooler than Boone Tan.

Can I use Golden Griffon instead of Boone Tan?

Not as a straight swap; see the closer alternatives below. Loose match (ΔE 29). Golden Griffon is a little darker, much more saturated, cooler than Boone Tan.

Can I use Boone Tan instead of Golden Griffon?

The same difference applies the other way round: Boone Tan is a little lighter, much more muted, 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.