Lights Out
#3d474b
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
#3d474b
RGB
61, 71, 75
OKLCh
39.0% 0.015 223.9°
CIELAB (D50)
29.4, -3.4, -3.9
What is true of this colour, and of no other
- 11 other named colours sit within ΔE00 2 of it — this part of the space is crowded, and the names here are finer distinctions than most people make.
- 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 92.1; on black, Lc -10.3. 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 5.8 and 6.3 and 14.1 — no red cone.
Text on this colour
White text
9.54:1 — passes AA
Black text
2.20:1 — fails AA
White text is the better of the two at9.54:1. That is enough for body text.
The same colour, with one cone missing
As you see it
#3d474b
protanopia
#46464b · ΔE00 5.8
deuteranopia
#44444b · ΔE00 6.3
tritanopia
#424261 · ΔE00 14.1
The twelve nearest named colours
Ranked by CIEDE2000 — perceptual distance, not hex arithmetic. The closest isDiamond Grey at ΔE00 0.499: below 1.0 — an ordinary observer cannot tell these apart, even side by side. What the numbers mean.
- Diamond GreyΔE00 0.499 · #3e474b
- Mount EtnaΔE00 0.545 · #3d484c
- NightshadeΔE00 0.663 · #3c464b
- Winter WayΔE00 0.874 · #3e474c
- Foggy NightΔE00 1.155 · #40494e
- Big DipperΔE00 1.546 · #41494b
- Dark SpaceΔE00 1.557 · #414a4c
- Dead ForestΔE00 1.801 · #434b4f
- Midnight HourΔE00 1.825 · #3b484f
- Panda BlackΔE00 1.973 · #3c4748
- Black SableΔE00 1.976 · #434b4d
- Cool Operator’s OverallsΔE00 2.001 · #384248
10 of these have no page of their own: pages exist for the 4,961 colours the dataset marks as good names.