ΔE 12.9, fair: the same colour family, but not a straight swap. Faded P.R.U. Blue is a little lighter, more muted than IJN/IJA Aotake.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 13). Faded P.R.U. Blue is a little lighter, more muted than IJN/IJA Aotake.
The same difference applies the other way round: IJN/IJA Aotake is a little darker, more saturated.
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 IJN/IJA Aotake on the colour wheel See Faded P.R.U. Blue on the colour wheel
All matches: IJN/IJA Aotake equivalents · Faded P.R.U. Blue equivalents