Brainmatter Beige vs Ivory Light

How close are they?

ΔE 6.2, close: similar, with a visible difference side by side. Ivory Light is a little lighter than Brainmatter Beige.

Can I use Ivory Light instead of Brainmatter Beige?

Usually, if you are not matching paint already on the model. Close match (ΔE 6). Ivory Light is a little lighter than Brainmatter Beige.

Can I use Brainmatter Beige instead of Ivory Light?

The same difference applies the other way round: Brainmatter Beige is a little darker.

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.