ΔE 11.3, fair: the same colour family, but not a straight swap. Insignia White is a little lighter, more muted, cooler than Screaming Skull.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 11). Insignia White is a little lighter, more muted, cooler than Screaming Skull.
The same difference applies the other way round: Screaming Skull is a little darker, 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.
See Screaming Skull on the colour wheel See Insignia White on the colour wheel
All matches: Screaming Skull equivalents · Insignia White equivalents