ΔE 13.0, fair: the same colour family, but not a straight swap. Pastel Blue is noticeably lighter, more muted, cooler than The Fang.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 13). Pastel Blue is noticeably lighter, more muted, cooler than The Fang.
The same difference applies the other way round: The Fang is noticeably 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 The Fang on the colour wheel See Pastel Blue on the colour wheel
All matches: The Fang equivalents · Pastel Blue equivalents