Company Grey vs Aged Bone

How close are they?

ΔE 15.9, loose: different enough that you should pick on purpose. Aged Bone is a little darker, more saturated than Company Grey.

Can I use Aged Bone instead of Company Grey?

Not as a straight swap; see the closer alternatives below. Loose match (ΔE 16). Aged Bone is a little darker, more saturated than Company Grey.

Can I use Company Grey instead of Aged Bone?

The same difference applies the other way round: Company Grey is a little lighter, 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.