HueComb

Umbra

#211e1f

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

#211e1f

RGB

33, 30, 31

OKLCh

23.9% 0.005 355.2°

CIELAB (D50)

11.6, 1.7, -0.1

What is true of this colour, and of no other

  • 6 other named colours sit within ΔE00 2 of it.
  • It uses only 5% 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 103.5; 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 8.6 — no blue cone.

Text on this colour

White text

16.53:1 — passes AA

Black text

1.27:1 — fails AA

White text is the better of the two at16.53:1. That is enough for body text.

The same colour, with one cone missing

As you see it

#211e1f

protanopia

#1e1e1f · ΔE00 2.2

deuteranopia

#1f1f1f · ΔE00 2.4

tritanopia

#202014 · ΔE00 8.6

Run a whole palette through all three

The twelve nearest named colours

Ranked by CIEDE2000 — perceptual distance, not hex arithmetic. The closest isDynamic Black at ΔE00 0.628: below 1.0 — an ordinary observer cannot tell these apart, even side by side. What the numbers mean.

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