ΔE 9.3, close: similar, with a visible difference side by side. Phthalo Blue (Red Shade) is a little darker, warmer than Triumphant Navy. They are different kinds of paint: Army Painter Triumphant Navy is an opaque base/layer paint and Golden Phthalo Blue (Red Shade) is an ink, glaze or transparent paint, so they won’t behave the same on the model even where the colour is close.
Usually, if you are not matching paint already on the model. Close match (ΔE 9). Phthalo Blue (Red Shade) is a little darker, warmer than Triumphant Navy. They are different kinds of paint.
The same difference applies the other way round: Triumphant Navy is a little lighter, cooler.
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 Triumphant Navy on the colour wheel See Phthalo Blue (Red Shade) on the colour wheel
All matches: Triumphant Navy equivalents · Phthalo Blue (Red Shade) equivalents