Hobgoblin Hue vs Off White

How close are they?

ΔE 7.8, close: similar, with a visible difference side by side. Off White is more saturated, cooler than Hobgoblin Hue.

Can I use Off White instead of Hobgoblin Hue?

Usually, if you are not matching paint already on the model. Close match (ΔE 8). Off White is more saturated, cooler than Hobgoblin Hue.

Can I use Hobgoblin Hue instead of Off White?

The same difference applies the other way round: Hobgoblin Hue is more muted, warmer.

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.