Pebble Beach

#ded8dc

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

#ded8dc

RGB

222, 216, 220

OKLCh

88.8% 0.009 337.5°

CIELAB (D50)

86.9, 2.7, -1.2

What is true of this colour, and of no other

28 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 10% 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 19.5; on black, Lc -83.9. 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 11.4 — no blue cone.

Text on this colour

White text

1.40:1 — fails AA

Black text

14.96:1 — passes AA

Black text is the better of the two at14.96:1. That is enough for body text.

As text on white, it needs to change

#7b7579 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

#ded8dc

protanopia

#d9d9dc · ΔE00 3.1

deuteranopia

#dadadc · ΔE00 3.3

tritanopia

#dbdbc9 · ΔE00 11.4

Run a whole palette through all three

The twelve nearest named colours

Ranked by CIEDE2000 — perceptual distance, not hex arithmetic. The closest isShy Pink at ΔE00 0.524: below 1.0 — an ordinary observer cannot tell these apart, even side by side. What the numbers mean.

Shy PinkΔE00 0.524 · #dfd9dc
Pearl PebbleΔE00 0.671 · #ded7da
Wishy-Washy RedΔE00 0.809 · #e1dadd
Light Magnolia RoseΔE00 0.828 · #dbd5da
Gentle VioletΔE00 0.88 · #dad5d9
Smoky OrchidΔE00 1.056 · #e1d9dc
Rusty PebbleΔE00 1.063 · #e3dce0
BreathlessΔE00 1.108 · #dfdae0
Minified CinnamonΔE00 1.122 · #ded9db
Puffball VapourΔE00 1.194 · #e2dadf
Sharp PebblesΔE00 1.232 · #dbd6d8
Philanthropist PinkΔE00 1.42 · #e2d9dd

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