ΔE 11.2, fair: the same colour family, but not a straight swap. Ivory is a little darker, more saturated, warmer than Trollblood Highlight.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 11). Ivory is a little darker, more saturated, warmer than Trollblood Highlight.
The same difference applies the other way round: Trollblood Highlight is a little lighter, more muted, 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 Trollblood Highlight on the colour wheel See Ivory on the colour wheel
All matches: Trollblood Highlight equivalents · Ivory equivalents