Oxford by Night
#001b2e
A blue that is nearly neutral — the hue shows only against a true grey. It is dark — it carries white text and needs care with black.
Hex
#001b2e
RGB
0, 27, 46
OKLCh
21.3% 0.051 242.1°
CIELAB (D50)
8.6, -4.2, -16.1
What is true of this colour, and of no other
- One other named colour sits within ΔE00 2 of it.
- It sits exactly on the sRGB boundary: at this lightness and hue the gamut has nothing left, and a wider display would show a more colourful version of it.
- As text on white it measures APCA Lc 104.2; 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.
- protanopia and deuteranopia and tritanopia shift it by ΔE00 11.4 and 12.0 and 11.0 — no red cone.
Text on this colour
White text
17.56:1 — passes AA
Black text
1.20:1 — fails AA
White text is the better of the two at17.56:1. That is enough for body text.
The same colour, with one cone missing
As you see it
#001b2e
protanopia
#19192e · ΔE00 11.4
deuteranopia
#15152e · ΔE00 12.0
tritanopia
#111145 · ΔE00 11.0
The twelve nearest named colours
Ranked by CIEDE2000 — perceptual distance, not hex arithmetic. The closest isCyanophobia at ΔE00 1.383: between 1 and 2 — a trained eye spots it when the two touch; nobody spots it across a room. What the numbers mean.
- CyanophobiaΔE00 1.383 · #001f33
- Celestial CanvasΔE00 3.117 · #0a2538
- The Count’s BlackΔE00 3.125 · #102030
- Fog of WarΔE00 3.281 · #112233
- Midnight DreamsΔE00 3.342 · #002233
- Creeping DeathΔE00 3.425 · #041723
- Kuretake Black MangaΔE00 4.116 · #001122
- Murky DepthsΔE00 4.282 · #02273a
- Trapped DarknessΔE00 4.408 · #0e1d32
- Hēi Sè BlackΔE00 4.416 · #142030
- Naval NightΔE00 4.881 · #011c39
- Midnight MirageΔE00 5.427 · #001f3f
7 of these have no page of their own: pages exist for the 4,961 colours the dataset marks as good names.