Hoeth Blue vs Spirit Blue

How close are they?

ΔE 25.6, loose: different enough that you should pick on purpose. Spirit Blue is a little lighter, more muted than Hoeth Blue.

Can I use Spirit Blue instead of Hoeth Blue?

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

Can I use Hoeth Blue instead of Spirit Blue?

The same difference applies the other way round: Hoeth Blue is a little 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.