ΔE 11.3, fair: the same colour family, but not a straight swap. Seafarer Blue is a little lighter, more muted, cooler than Arctic Gem.
✓ Two Thin Coats comparison chart lists these two as equivalents.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 11). Seafarer Blue is a little lighter, more muted, cooler than Arctic Gem.
The same difference applies the other way round: Arctic Gem is a little darker, 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 Arctic Gem on the colour wheel See Seafarer Blue on the colour wheel
All matches: Arctic Gem equivalents · Seafarer Blue equivalents