ΔE 3.6, very close: most people won’t see a difference side by side. Ivory is a little lighter, cooler than Polished Bone.
Yes, for most jobs. Very close match (ΔE 4). Ivory is a little lighter, cooler than Polished Bone.
The same difference applies the other way round: Polished Bone 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 Polished Bone on the colour wheel See Ivory on the colour wheel
All matches: Polished Bone equivalents · Ivory equivalents