ΔE 13.2, fair: the same colour family, but not a straight swap. Templar Blue is a little darker, more muted than Ocean Depths.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 13). Templar Blue is a little darker, more muted than Ocean Depths.
The same difference applies the other way round: Ocean Depths is a little 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 Ocean Depths on the colour wheel See Templar Blue on the colour wheel
All matches: Ocean Depths equivalents · Templar Blue equivalents