ΔE 5.5, very close: most people won’t see a difference side by side. Underhive Ash is a little lighter, cooler than Splinter Grey.
Yes, for most jobs. Very close match (ΔE 6). Underhive Ash is a little lighter, cooler than Splinter Grey.
The same difference applies the other way round: Splinter Grey is a little 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 Splinter Grey on the colour wheel See Underhive Ash on the colour wheel
All matches: Splinter Grey equivalents · Underhive Ash equivalents