Noir
#312b27
A neutral that has no useful hue — it reads as a grey. It is dark — it carries white text and needs care with black.
Hex
#312b27
RGB
49, 43, 39
OKLCh
29.4% 0.011 55.9°
CIELAB (D50)
18.1, 2.2, 3.7
What is true of this colour, and of no other
- 3 other named colours sit within ΔE00 2 of it.
- It uses only 16% 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 100.6; on black, Lc 0.0. 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.
- tritanopia shifts it by ΔE00 15.5 — no blue cone.
Text on this colour
White text
13.95:1 — passes AA
Black text
1.51:1 — fails AA
White text is the better of the two at13.95:1. That is enough for body text.
The same colour, with one cone missing
As you see it
#312b27
protanopia
#2c2c27 · ΔE00 4.3
deuteranopia
#2d2d27 · ΔE00 4.6
tritanopia
#2e2e02 · ΔE00 15.5
The twelve nearest named colours
Ranked by CIEDE2000 — perceptual distance, not hex arithmetic. The closest isIndustrial Black at ΔE00 0.799: below 1.0 — an ordinary observer cannot tell these apart, even side by side. What the numbers mean.
- Industrial BlackΔE00 0.799 · #322b26
- Holy CrowΔE00 1.797 · #332f2c
- DieselΔE00 1.991 · #322c2b
- Livid BrownΔE00 2.156 · #312a29
- AcadiaΔE00 2.389 · #35312c
- Coffee BeanΔE00 2.426 · #362d26
- Bokara GreyΔE00 2.579 · #2a2725
- Deep Daichi BlackΔE00 2.681 · #322d2d
- Night Brown BlackΔE00 2.704 · #322d25
- Night RiderΔE00 2.774 · #332e2e
- Wood BarkΔE00 2.854 · #302621
- Orka BlackΔE00 2.984 · #27221f
8 of these have no page of their own: pages exist for the 4,961 colours the dataset marks as good names.