ΔE 5.6, very close: most people won’t see a difference side by side. Sulfide Ochre is a little lighter, cooler than IDF Sand Grey 1970s-1980s.
Yes, for most jobs. Very close match (ΔE 6). Sulfide Ochre is a little lighter, cooler than IDF Sand Grey 1970s-1980s.
The same difference applies the other way round: IDF Sand Grey 1970s-1980s is a little darker, 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.
See IDF Sand Grey 1970s-1980s on the colour wheel See Sulfide Ochre on the colour wheel
All matches: IDF Sand Grey 1970s-1980s equivalents · Sulfide Ochre equivalents