ΔE 13.3, fair: the same colour family, but not a straight swap. Paralyze Blue is noticeably lighter, cooler than Celestium Blue.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 13). Paralyze Blue is noticeably lighter, cooler than Celestium Blue.
The same difference applies the other way round: Celestium Blue is noticeably darker, 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.
See Celestium Blue on the colour wheel See Paralyze Blue on the colour wheel
All matches: Celestium Blue equivalents · Paralyze Blue equivalents