April Showers

#dadeb5

A yellow that is nearly neutral — the hue shows only against a true grey. It is very light — it works as a page background, not as text.

Hex

#dadeb5

RGB

218, 222, 181

OKLCh

88.7% 0.054 112.0°

CIELAB (D50)

87.4, -6.5, 19.7

What is true of this colour, and of no other

10 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 28% 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 19.0; on black, Lc -84.5. 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 5.2 — no blue cone.

Text on this colour

White text

1.39:1 — fails AA

Black text

15.10:1 — passes AA

Black text is the better of the two at15.10:1. That is enough for body text.

As text on white, it needs to change

#767a54 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

#dadeb5

protanopia

#dedeb5 · ΔE00 1.5

deuteranopia

#ddddb5 · ΔE00 1.5

tritanopia

#dcdcc4 · ΔE00 5.2

Run a whole palette through all three

The twelve nearest named colours

Ranked by CIEDE2000 — perceptual distance, not hex arithmetic. The closest isSpring Thyme at ΔE00 0.458: below 1.0 — an ordinary observer cannot tell these apart, even side by side. What the numbers mean.

Spring ThymeΔE00 0.458 · #d8dcb3
Clean AirΔE00 0.719 · #d8ddb6
Lime GranitaΔE00 0.731 · #dce1b8
Timid AbsintheΔE00 1.526 · #dadfb0
Beach GrassΔE00 1.539 · #dcddb8
Ethereal OneΔE00 1.547 · #dedeb6
Glass GreenΔE00 1.602 · #dcdfb0
Kohlrabi GreenΔE00 1.796 · #d9d9b1
Foamy LimeΔE00 1.854 · #dce2be
Loch Modan MossΔE00 1.921 · #dfe5bf
ZombieΔE00 2.012 · #dadead
Carpathian DawnΔE00 2.096 · #dee3c0

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