Freezing Moon vs Hoeth Blue

How close are they?

ΔE 26.4, loose: different enough that you should pick on purpose. Hoeth Blue is a little lighter, much more saturated than Freezing Moon.

Can I use Hoeth Blue instead of Freezing Moon?

Not as a straight swap; see the closer alternatives below. Loose match (ΔE 26). Hoeth Blue is a little lighter, much more saturated than Freezing Moon.

Can I use Freezing Moon instead of Hoeth Blue?

The same difference applies the other way round: Freezing Moon is a little darker, 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.