Bastion Grey vs Pale Blue Grey

How close are they?

ΔE 21.8, loose: different enough that you should pick on purpose. Pale Blue Grey is noticeably lighter, more muted than Bastion Grey.

Can I use Pale Blue Grey instead of Bastion Grey?

Not as a straight swap; see the closer alternatives below. Loose match (ΔE 22). Pale Blue Grey is noticeably lighter, more muted than Bastion Grey.

Can I use Bastion Grey instead of Pale Blue Grey?

The same difference applies the other way round: Bastion Grey is noticeably darker, more saturated.

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.