Both are very dark blues; midnight blue sits slightly further towards violet, while navy stays closer to a pure deep blue.
Clear difference: they share essentially the same hue, Midnight Blue is noticeably more muted. The difference is readily visible side by side and usually still recognisable when the two are seen separately.
Perceptual distance
ΔE 5.6
Clear difference
Hue difference
4°
same hue
Lightness
+3 L*
Midnight Blue is similar
Chroma
-21 C*
Midnight Blue is more muted
Where each sits on the two axes
Positions are plotted from each colour’s measured CIELAB values. The scale is perceptual, not a paint-mixing ratio.
Warmth: Navy Blue reads cool, Midnight Blue reads cool. Both sit on the same side of the warm/cool divide, so they will generally coordinate rather than clash, even where they are clearly different in depth.
The two are close enough that most people cannot separate them without a direct side-by-side comparison, and clothing and paint ranges use the names for overlapping colours with no agreed boundary.
Navy is the working dark blue: uniform, tailoring, workwear, cabinetry and exterior joinery, where it functions as a neutral.
Choose it when: Choose navy when the item must coordinate with other navy pieces — uniform, a suit separates system, or existing joinery — where even a small hue shift will show.
Full navy blue profileMidnight blue is the more decorative of the two, used for evening wear and for interiors aiming at a slightly richer, more nocturnal depth than navy provides.
Choose it when: Choose midnight blue when you want the depth of navy with a fractionally warmer, more violet cast, particularly under artificial light where it holds its richness well.
Full midnight blue profileTrying to match a replacement item to existing navy by name alone. The names are not precise enough to guarantee a match, and the mismatch will be invisible in the shop and obvious at home in daylight.
At this depth, the difference between the two is essentially undetectable in low light. Any decision that depends on telling them apart needs daylight or a high-CRI light source.
A screen cannot predict how either colour will look on a real surface — see why colours differ between sample, wall and screen.
Placed directly against each other, Navy Blue and Midnight Blue give a contrast ratio of 1.08:1 — not enough for one to be used as text on the other at any size.
Contrast is only one part of an accessible pairing — see the accessibility guidance.
Measured differences (perceptual distance, hue, lightness, chroma, undertone) are calculated from each colour's own catalogue values. The usage and decision guidance is Colourwise editorial judgement drawn from conventional decorating and design practice, not a manufacturer claim — see /methodology.