Hale Navy is one of Benjamin Moore's finest navies — deep, slightly soft, with a violet-blue bias that shows up under low light. That bias is the key to pairing it well: warm, earthy, grounded colours flatter it, while anything cold and clinical makes it look flat.
My first piece of advice is to consider drenching it. Hale Navy is at its best when walls, woodwork, and ceiling all wear the same colour at different sheens — matt walls, eggshell trim, a whisper of sheen on the ceiling. You get depth and richness without the room being chopped into pieces by contrasting trim.
If the woodwork *must* contrast, reach for a chalky warm off-white — never brilliant white. Brilliant white throws the navy's violet undertone into a cold, jarring light. Paint & Paper Library Sand I (LRV 95.4) is exactly the kind of soft, warm off-white that does the job — it reads clean without going icy. If you want something a touch warmer still, Farrow & Ball All White (LRV 92) is a calmer companion than any bright trade white.
For accents, this is where Hale Navy comes alive. Aged metallics — antique brass, burnished bronze, copper — sit beautifully against it. Dulux Copper Glow (LRV 30.1) picks up that metallic warmth as a paint accent, lovely on an alcove or an inside reveal. For a deep, textural partner, Mylands Cigar BH.20 (LRV 11.8) brings a tobacco-brown richness that grounds the scheme and stops it feeling cold. Add claret or ochre in textiles — a velvet cushion, a rug — and you've got a properly handsome room.
One practical note on lighting: that violet-blue bias rewards warm light. Stick to incandescent or 2700K LEDs. Cool 4000K bulbs will pull Hale Navy grey and sap its richness. Get the lighting right and the rest looks after itself.