Bonne Nuit
#3a4866
A blue that is nearly neutral — the hue shows only against a true grey. It is mid — the hardest range to put text on, either colour struggles.
Hex
#3a4866
RGB
58, 72, 102
OKLCh
40.3% 0.054 264.8°
CIELAB (D50)
30.4, 0.8, -19.6
What is true of this colour, and of no other
- 8 other named colours sit within ΔE00 2 of it.
- It uses only 20% of the chroma available at this lightness and hue — there is a far more vivid version of this colour inside sRGB.
- As text on white it measures APCA Lc 91.0; on black, Lc -11.3. The sign is the polarity, which the WCAG ratio discards.
- Built into an eleven-step scale, 10 of the 10 adjacent pairs stay ΔE00 2 apart — see the ramp.
- protanopia and deuteranopia and tritanopia shift it by ΔE00 6.1 and 6.1 and 6.1 — no red cone.
Text on this colour
White text
9.14:1 — passes AA
Black text
2.30:1 — fails AA
White text is the better of the two at9.14:1. That is enough for body text.
The same colour, with one cone missing
As you see it
#3a4866
protanopia
#474766 · ΔE00 6.1
deuteranopia
#444466 · ΔE00 6.1
tritanopia
#42427c · ΔE00 6.1
The twelve nearest named colours
Ranked by CIEDE2000 — perceptual distance, not hex arithmetic. The closest isGarnet Stone Blue at ΔE00 0.777: below 1.0 — an ordinary observer cannot tell these apart, even side by side. What the numbers mean.
- Garnet Stone BlueΔE00 0.777 · #384866
- Sargasso SeaΔE00 0.829 · #3d4a67
- BusterΔE00 1.126 · #3e4b69
- Royal WaveΔE00 1.305 · #3e4967
- Mountain BlueberryΔE00 1.336 · #3c4b6c
- Jazz Age BluesΔE00 1.341 · #3b4a6c
- Blackberry CobblerΔE00 1.777 · #404d6a
- Naval BlueΔE00 1.932 · #384b6b
- Starlit NightΔE00 2.034 · #3b476b
- Egyptian VioletΔE00 2.087 · #3d496d
- Silent SeaΔE00 2.313 · #3a4a63
- DiplomaticΔE00 2.322 · #3a445d
9 of these have no page of their own: pages exist for the 4,961 colours the dataset marks as good names.