ΔE 10.1, fair: the same colour family, but not a straight swap. Cement Grey is a little darker, cooler than Splinter Grey.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 10). Cement Grey is a little darker, cooler than Splinter Grey.
The same difference applies the other way round: Splinter Grey is a little lighter, 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 Cement Grey on the colour wheel
All matches: Splinter Grey equivalents · Cement Grey equivalents