Nightfall
#43535e
A neutral that has no useful hue — it reads as a grey. It is mid — the hardest range to put text on, either colour struggles.
Hex
#43535e
RGB
67, 83, 94
OKLCh
43.3% 0.027 238.3°
CIELAB (D50)
34.2, -4.3, -8.6
What is true of this colour, and of no other
- 7 other named colours sit within ΔE00 2 of it.
- It uses only 28% 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 87.6; on black, Lc -14.5. 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 8.5 and 9.1 and 14.0 — no red cone.
Text on this colour
White text
7.96:1 — passes AA
Black text
2.64:1 — fails AA
White text is the better of the two at7.96:1. That is enough for body text.
The same colour, with one cone missing
As you see it
#43535e
protanopia
#51515e · ΔE00 8.5
deuteranopia
#4f4f5e · ΔE00 9.1
tritanopia
#4c4c7d · ΔE00 14.0
The twelve nearest named colours
Ranked by CIEDE2000 — perceptual distance, not hex arithmetic. The closest isNight View at ΔE00 0.863: below 1.0 — an ordinary observer cannot tell these apart, even side by side. What the numbers mean.
- Night ViewΔE00 0.863 · #465560
- Good Night!ΔE00 1.443 · #46565f
- Slate WallΔE00 1.476 · #40535d
- Night TideΔE00 1.554 · #455360
- Seal BlueΔE00 1.67 · #475663
- Flapper DanceΔE00 1.738 · #495762
- San JuanΔE00 1.876 · #445761
- Moody BlackΔE00 2.054 · #49555d
- PresidentialΔE00 2.124 · #3e4d59
- Winter SolsticeΔE00 2.245 · #49545c
- Royal NavyΔE00 2.279 · #45505b
- Sea BlitheΔE00 2.289 · #41545c
11 of these have no page of their own: pages exist for the 4,961 colours the dataset marks as good names.