Hobgoblin Hue vs Ivory Light

How close are they?

ΔE 8.9, close: similar, with a visible difference side by side. Ivory Light is a little lighter, more muted than Hobgoblin Hue.

Can I use Ivory Light instead of Hobgoblin Hue?

Usually, if you are not matching paint already on the model. Close match (ΔE 9). Ivory Light is a little lighter, more muted than Hobgoblin Hue.

Can I use Hobgoblin Hue instead of Ivory Light?

The same difference applies the other way round: Hobgoblin Hue 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.