ΔE 14.1, fair: the same colour family, but not a straight swap. Underbelly Blue is noticeably darker, more saturated than White Scar.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 14). Underbelly Blue is noticeably darker, more saturated than White Scar.
The same difference applies the other way round: White Scar is noticeably lighter, 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.
See White Scar on the colour wheel See Underbelly Blue on the colour wheel
All matches: White Scar equivalents · Underbelly Blue equivalents