M-485 Blue-Grey vs Celestra Grey

How close are they?

ΔE 9.7, close: similar, with a visible difference side by side. Celestra Grey is a little lighter than M-485 Blue-Grey.

Can I use Celestra Grey instead of M-485 Blue-Grey?

Usually, if you are not matching paint already on the model. Close match (ΔE 10). Celestra Grey is a little lighter than M-485 Blue-Grey.

Can I use M-485 Blue-Grey instead of Celestra Grey?

The same difference applies the other way round: M-485 Blue-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.