ΔE 12.1, fair: the same colour family, but not a straight swap. Smoke Blue is a little lighter, more saturated than Corax White.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 12). Smoke Blue is a little lighter, more saturated than Corax White.
The same difference applies the other way round: Corax White is a little darker, 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 Corax White on the colour wheel See Smoke Blue on the colour wheel
All matches: Corax White equivalents · Smoke Blue equivalents