- Hue
- A near-neutral, so there is no hue relationship to get wrong — the pairing is decided by depth and finish alone, which is why neutrals are the reliable answer beside a strong navy blue.
- Lightness
- moderately deeper than Navy Blue — a gap of about 13 lightness steps, which is enough to read as separate up close, though it will compress under a flash.
- Saturation
- Chroma 0 — effectively a neutral. Across a modest area that is the point: it holds the outfit together without asking for attention.
- Temperature
- Temperature-neutral, so it will not argue with Navy Blue whichever way Navy Blue leans.
- Formality
- Very deep colours read dressier than this occasion needs. That is not a problem — being slightly over is more comfortable than being under — but it is worth knowing which direction you are erring in.
- Fabric
- Whatever fabric this ends up in will shift the colour: a pile or a nap reads deeper, a satin or a silk reads lighter along the highlight. Match sheen before you match shade.
- Season
- Season and climate change what this colour looks like more than most people expect — direct summer sun saturates, flat winter light does the opposite.
- Where you will be
- Expect mixed indoor and daylight and stage or screen at a interview.
- In photographs
- Very deep colours lose all shape detail against a dark background — the outline survives, the garment does not.
- How it goes wrong
- Shoes lighter than the trousers, which draws attention downward and shortens the line — occasionally the intention, usually not. The strategy-level risk is landing in the near-miss band — close enough to the anchor to look like an attempted match, far enough to fail it.