Do Not Disturb
#363b43
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
#363b43
RGB
54, 59, 67
OKLCh
35.1% 0.015 259.8°
CIELAB (D50)
24.6, -0.7, -5.7
What is true of this colour, and of no other
- 6 other named colours sit within ΔE00 2 of it.
- It uses only 11% 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 96.0; 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 7.9 — no blue cone.
Text on this colour
White text
11.27:1 — passes AA
Black text
1.86:1 — fails AA
White text is the better of the two at11.27:1. That is enough for body text.
The same colour, with one cone missing
As you see it
#363b43
protanopia
#3a3a43 · ΔE00 3.2
deuteranopia
#3a3a43 · ΔE00 3.4
tritanopia
#39394e · ΔE00 7.9
The twelve nearest named colours
Ranked by CIEDE2000 — perceptual distance, not hex arithmetic. The closest isAntarctic Deep at ΔE00 1.419: between 1 and 2 — a trained eye spots it when the two touch; nobody spots it across a room. What the numbers mean.
- Antarctic DeepΔE00 1.419 · #35383f
- School InkΔE00 1.476 · #31373f
- Night WizardΔE00 1.507 · #313740
- CryptΔE00 1.676 · #373b40
- FerryΔE00 1.698 · #383e44
- GlaucophobiaΔE00 1.739 · #3a3f45
- MetaliseΔE00 2.152 · #34373c
- Artist’s CharcoalΔE00 2.164 · #37393e
- Prestige BlueΔE00 2.17 · #303742
- Blue PlazaΔE00 2.239 · #30363c
- Very BlackΔE00 2.303 · #34363e
- SupernaturalΔE00 2.33 · #313641
11 of these have no page of their own: pages exist for the 4,961 colours the dataset marks as good names.