Ephemeral Red

#e4cfd7

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

#e4cfd7

RGB

228, 207, 215

OKLCh

87.4% 0.026 352.6°

CIELAB (D50)

85.1, 8.6, -1.2

What is true of this colour, and of no other

22 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 33% 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 22.6; on black, Lc -80.7. 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.
protanopia and deuteranopia and tritanopia shift it by ΔE00 9.2 and 9.8 and 31.1 — no red cone.

Text on this colour

White text

1.48:1 — fails AA

Black text

14.21:1 — passes AA

Black text is the better of the two at14.21:1. That is enough for body text.

As text on white, it needs to change

#857279 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

#e4cfd7

protanopia

#d1d1d7 · ΔE00 9.2

deuteranopia

#d5d5d7 · ΔE00 9.8

tritanopia

#dada82 · ΔE00 31.1

Run a whole palette through all three

The twelve nearest named colours

Ranked by CIEDE2000 — perceptual distance, not hex arithmetic. The closest isPrim at ΔE00 0.471: below 1.0 — an ordinary observer cannot tell these apart, even side by side. What the numbers mean.

PrimΔE00 0.471 · #e2cdd5
Pink FrappéΔE00 1.12 · #e6d2dc
Light Pelican BillΔE00 1.148 · #e1ced4
Barely BerryΔE00 1.206 · #e4ccd4
Orchid RoseΔE00 1.274 · #e9d1da
Nefarious MauveΔE00 1.29 · #e6d1dc
French LavenderΔE00 1.424 · #dfc9d1
Santolina BloomsΔE00 1.439 · #e3d0d5
Ibis MouseΔE00 1.474 · #e4d2d8
Swiss RoseΔE00 1.492 · #e8d5dd
Light Tip ToesΔE00 1.496 · #e1d0d8
Blissful LightΔE00 1.569 · #e5d2dd

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