ΔE 12.8, fair: the same colour family, but not a straight swap. Typhon Ash is a little darker, more muted than Splinter Grey.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 13). Typhon Ash is a little darker, more muted than Splinter Grey.
The same difference applies the other way round: Splinter Grey is a little lighter, more saturated.
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 Splinter Grey on the colour wheel See Typhon Ash on the colour wheel
All matches: Splinter Grey equivalents · Typhon Ash equivalents