Bleached Strap Grey vs Purple Black

How close are they?

ΔE 6.2, close: similar, with a visible difference side by side. Purple Black is more saturated than Bleached Strap Grey.

Can I use Purple Black instead of Bleached Strap Grey?

Usually, if you are not matching paint already on the model. Close match (ΔE 6). Purple Black is more saturated than Bleached Strap Grey.

Can I use Bleached Strap Grey instead of Purple Black?

The same difference applies the other way round: Bleached Strap Grey is more muted.

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.