Catacomb Walls

#dbd7d0

A neutral that has no useful hue — it reads as a grey. It is very light — it works as a page background, not as text.

Hex

#dbd7d0

RGB

219, 215, 208

OKLCh

88.0% 0.011 81.8°

CIELAB (D50)

86.2, 0.5, 4.0

What is true of this colour, and of no other

65 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 only 9% 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 20.8; on black, Lc -82.5. 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 6.7 — no blue cone.

Text on this colour

White text

1.43:1 — fails AA

Black text

14.64:1 — passes AA

Black text is the better of the two at14.64:1. That is enough for body text.

As text on white, it needs to change

#7a7670 is the nearest colour of the same hue that passes AA on white, at 4.50:1. Only the lightness moved.

Try it against your own background

The same colour, with one cone missing

As you see it

#dbd7d0

protanopia

#d7d7d0 · ΔE00 2.2

deuteranopia

#d8d8d0 · ΔE00 2.3

tritanopia

#d9d9c3 · ΔE00 6.7

Run a whole palette through all three

The twelve nearest named colours

Ranked by CIEDE2000 — perceptual distance, not hex arithmetic. The closest isDrift of Mist at ΔE00 0.509: below 1.0 — an ordinary observer cannot tell these apart, even side by side. What the numbers mean.

Drift of MistΔE00 0.509 · #dcd8d0
Timid WhiteΔE00 0.598 · #d9d6cf
GalleryΔE00 0.789 · #dcd7d1
Silent SmokeΔE00 0.917 · #dbd7ce
Eastern WolfΔE00 0.958 · #dbd7d2
Light Vanilla QuakeΔE00 1.089 · #d8d5d0
Light Limed WhiteΔE00 1.096 · #dbd5ce
Empire PorcelainΔE00 1.125 · #e0dbd3
Simple WhiteΔE00 1.173 · #dfd9d2
River SharkΔE00 1.216 · #dfdcd5
Light Crushed AlmondΔE00 1.246 · #ddd7d1
Winter WalkΔE00 1.278 · #d8d5cc

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