ΔE 13.1, fair: the same colour family, but not a straight swap. Intermediate Blue (US Navy) is noticeably darker, more muted than Aegis Aqua.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 13). Intermediate Blue (US Navy) is noticeably darker, more muted than Aegis Aqua.
The same difference applies the other way round: Aegis Aqua is noticeably lighter, 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 Aegis Aqua on the colour wheel See Intermediate Blue (US Navy) on the colour wheel
All matches: Aegis Aqua equivalents · Intermediate Blue (US Navy) equivalents