Intermediate Blue vs Blue Horror

How close are they?

ΔE 13.0, fair: the same colour family, but not a straight swap. Blue Horror is noticeably lighter, more saturated, cooler than Intermediate Blue.

Can I use Blue Horror instead of Intermediate Blue?

Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 13). Blue Horror is noticeably lighter, more saturated, cooler than Intermediate Blue.

Can I use Intermediate Blue instead of Blue Horror?

The same difference applies the other way round: Intermediate Blue is noticeably darker, more muted, 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.