Meredius Blue vs Blue Green

How close are they?

ΔE 22.9, loose: different enough that you should pick on purpose. Blue Green is noticeably darker, more muted, cooler than Meredius Blue.

Can I use Blue Green instead of Meredius Blue?

Not as a straight swap; see the closer alternatives below. Loose match (ΔE 23). Blue Green is noticeably darker, more muted, cooler than Meredius Blue.

Can I use Meredius Blue instead of Blue Green?

The same difference applies the other way round: Meredius Blue is noticeably lighter, more saturated, warmer.

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.