Alone in the Dark
#000066
A blue that is saturated. It is dark — it carries white text and needs care with black.
Hex
#000066
RGB
0, 0, 102
OKLCh
23.1% 0.160 264.1°
CIELAB (D50)
7.3, 34.7, -57.1
What is true of this colour, and of no other
- 4 other named colours sit 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 102.9; 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.
- All three dichromacies see it as very nearly the same colour you do: its hue is not the part carrying its identity.
Text on this colour
White text
17.62:1 — passes AA
Black text
1.19:1 — fails AA
White text is the better of the two at17.62:1. That is enough for body text.
The same colour, with one cone missing
As you see it
#000066
protanopia
#000066 · ΔE00 0.0
deuteranopia
#000066 · ΔE00 0.0
tritanopia
#000066 · ΔE00 0.0
The twelve nearest named colours
Ranked by CIEDE2000 — perceptual distance, not hex arithmetic. The closest isThe Vast of Night at ΔE00 1.407: between 1 and 2 — a trained eye spots it when the two touch; nobody spots it across a room. What the numbers mean.
- The Vast of NightΔE00 1.407 · #110066
- D. Darx BlueΔE00 1.72 · #030764
- Dark RoyaltyΔE00 1.958 · #02066f
- Abyssal BlueΔE00 1.985 · #00035b
- Deep BlueΔE00 2.009 · #040273
- Prussian NightsΔE00 2.296 · #0b085f
- Quantum of LightΔE00 2.341 · #130173
- Underground StreamΔE00 2.454 · #120a65
- Scotch BlueΔE00 2.481 · #000077
- Insomniac BlueΔE00 2.726 · #110077
- Alucard’s NightΔE00 2.764 · #000055
- RavenclawΔE00 3.229 · #0a0555
8 of these have no page of their own: pages exist for the 4,961 colours the dataset marks as good names.