HueComb

Dark Void

#151517

A neutral that has no useful hue — it reads as a grey. It is very dark — white text sits on it comfortably, black text does not.

Hex

#151517

RGB

21, 21, 23

OKLCh

19.7% 0.004 286.0°

CIELAB (D50)

6.8, 0.4, -1.3

What is true of this colour, and of no other

  • 15 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 almost none of the chroma available here: this is a grey with a trace of hue rather than a colour.
  • As text on white it measures APCA Lc 104.9; 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

18.24:1 — passes AA

Black text

1.15:1 — fails AA

White text is the better of the two at18.24:1. That is enough for body text.

The same colour, with one cone missing

As you see it

#151517

protanopia

#151517 · ΔE00 0.0

deuteranopia

#151517 · ΔE00 0.0

tritanopia

#151517 · ΔE00 0.0

Run a whole palette through all three

The twelve nearest named colours

Ranked by CIEDE2000 — perceptual distance, not hex arithmetic. The closest isPiano Black at ΔE00 1.004: between 1 and 2 — a trained eye spots it when the two touch; nobody spots it across a room. What the numbers mean.

6 of these have no page of their own: pages exist for the 4,961 colours the dataset marks as good names.