Longbeard Grey vs Light Gray FS36495

How close are they?

ΔE 6.9, close: similar, with a visible difference side by side. Light Gray FS36495 is a little lighter than Longbeard Grey.

Can I use Light Gray FS36495 instead of Longbeard Grey?

Usually, if you are not matching paint already on the model. Close match (ΔE 7). Light Gray FS36495 is a little lighter than Longbeard Grey.

Can I use Longbeard Grey instead of Light Gray FS36495?

The same difference applies the other way round: Longbeard Grey 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.