Briar Queen Chill vs Blue Glacier

How close are they?

ΔE 16.0, loose: different enough that you should pick on purpose. Blue Glacier is a little darker, much more saturated than Briar Queen Chill.

Can I use Blue Glacier instead of Briar Queen Chill?

Not as a straight swap; see the closer alternatives below. Loose match (ΔE 16). Blue Glacier is a little darker, much more saturated than Briar Queen Chill.

Can I use Briar Queen Chill instead of Blue Glacier?

The same difference applies the other way round: Briar Queen Chill is a little lighter, much 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.