#3A4866Bonne Nuit (#3A4866) is a dark, muted blue with an OKLCH hue of 265°, lightness 0.4 and chroma 0.054. It sits on the cool side of the color wheel. In practice it behaves as a mid-weight working color for secondary surfaces and editorial blocks.
| HEX | #3A4866 |
|---|---|
| RGB | rgb(58, 72, 102) |
| HSL | hsl(221, 28%, 31%) |
| HSV | hsv(221, 43%, 40%) |
| CMYK | cmyk(43%, 29%, 0%, 60%) |
| CIE Lab | lab(30.6 3.1 -19.3) |
| OKLCH | oklch(0.403 0.054 265) |
Under warm 2700K interior light Bonne Nuit shifts subtly: leans toward purple; in north-facing or shaded light it is virtually unchanged. Overall drift across common illuminants is small (max ΔE ≈ 1.3), so it is a lighting-stable choice.
#3f465f — ΔE 1.3, shifts subtly: leans toward purple#3d4964 — ΔE 0.7, is virtually unchanged#3a4866 — ΔE 0.0, is virtually unchanged#3a4867 — ΔE 0.2, is virtually unchangedTest Bonne Nuit in the color lighting simulator — sweep it through daylight, warm 2700K light, 4000K LED, and shade alongside the rest of your palette.
Against white it measures 9.14:1 and against black 2.3:1, so white text is the stronger pairing. That pairing passes WCAG AA for body text. Avoid black text on this color entirely.
One color explored: close hues with real lightness and chroma structure, so the palette is the anchor through value rather than a set of colors.
#8e9ab4 · #677591 · #3a4866 · #24304b · #091229 · #000009
The anchor's neighbours on the wheel — everything shares an undertone, so the chord carries color without anything having to be muted to get along.
#467086 · #3a5c7d · #3a4866 · #32345c · #2d2245 · #25122e
The mid-gap pairing — sage and mustard, terracotta and olive. A foil rotated 40–65° toward warm or cool: too far to be kin, too near to argue, carried by temperature and a deliberate value offset.
#aa98b1 · #93739f · #6d5e73 · #3a4866 · #1e2d4f · #091532
One deliberately opposed voice — a single restrained counterpoint across the wheel, or temperature against temperature where the anchor is too muted to carry a loud opposite.
#dbc18c · #7c879e · #616774 · #3a4866 · #222c41 · #0c121e
The anchor as the only color in the room. True neutrals or complement-warmed near-neutrals let it stay dominant.
#f5f1ea · #a2a7b0 · #63615c · #3a4866 · #2d313a · #030200
This color as a ground rather than a subject — its own restraint held across a narrow value band, carrying one saturated voice from the opposite temperature.
#ecf2ff · #c1c9d9 · #3a4866 · #182237 · #000213 · #edbc4d
The opposite hue on the perceptual wheel, tempered to field strength — warm/cool tension without vibration.
#f9f1e1 · #b8a47c · #755e2b · #3a4866 · #402e00 · #000008
The complement's two neighbours instead of the complement itself — strong contrast with a lower clash risk.
#f9f1e1 · #c59d83 · #606632 · #3a4866 · #49270d · #010100
Three hues spaced evenly around the wheel; the anchor leads and the other two are held at supporting strength.
#ffedeb · #ca9894 · #456d46 · #3a4866 · #1a391c · #050000
Two complementary pairs offset by 90° — the richest chord, kept usable by a strict lightness hierarchy.
#ffecf2 · #c697a9 · #755e2b · #3a4866 · #003b2f · #0e0600
#55627E · #727E97 · #909AB0 · #AFB8CA · #CFD6E5
#2F3C57 · #253048 · #1B253A · #121A2C · #09101F
#3D4860 · #40485A · #434953
Its moderate chroma lets it work in mid-size areas — upholstery, secondary UI surfaces, editorial blocks — without overwhelming neighbors. In palettes it pairs most predictably with its tonal ramp and analogous neighbors; reserve the complementary hue for small, deliberate contrast.