ΔE 14.8, fair: the same colour family, but not a straight swap. Parchment is much more muted, cooler than Hearthborn.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 15). Parchment is much more muted, cooler than Hearthborn.
The same difference applies the other way round: Hearthborn is much more saturated, 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 Hearthborn on the colour wheel See Parchment on the colour wheel
All matches: Hearthborn equivalents · Parchment equivalents