ΔE 14.7, fair: the same colour family, but not a straight swap. Ink Sepia is a little darker, more muted, warmer than Inktense Olive.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 15). Ink Sepia is a little darker, more muted, warmer than Inktense Olive.
The same difference applies the other way round: Inktense Olive is a little lighter, more saturated, cooler.
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 Inktense Olive on the colour wheel See Ink Sepia on the colour wheel
All matches: Inktense Olive equivalents · Ink Sepia equivalents