Splashdown

#d4e8d8

A green 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

#d4e8d8

RGB

212, 232, 216

OKLCh

91.2% 0.030 151.5°

CIELAB (D50)

90.2, -9.1, 5.4

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 20% 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 14.2; on black, Lc -89.7. 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 8.3 and 8.7 and 21.4 — no red cone.

Text on this colour

White text

1.29:1 — fails AA

Black text

16.33:1 — passes AA

Black text is the better of the two at16.33:1. That is enough for body text.

As text on white, it needs to change

#697b6d 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

#d4e8d8

protanopia

#e6e6d8 · ΔE00 8.3

deuteranopia

#e2e2d8 · ΔE00 8.7

tritanopia

#dedeff · ΔE00 21.4

Run a whole palette through all three

The twelve nearest named colours

Ranked by CIEDE2000 — perceptual distance, not hex arithmetic. The closest isLight Enchanted at ΔE00 0.592: below 1.0 — an ordinary observer cannot tell these apart, even side by side. What the numbers mean.

Light EnchantedΔE00 0.592 · #d6eadb
Moonlight GreenΔE00 0.692 · #d2e8d8
Peppermint PattyΔE00 0.705 · #d1e6d5
Light KatsuraΔE00 0.83 · #d6ead8
Jade MistΔE00 0.869 · #d6e9d7
Herbal MistΔE00 1.197 · #d2e6d3
Light Duck Egg CreamΔE00 1.213 · #d5ebdd
Light Green WashΔE00 1.325 · #d4e6d9
BathΔE00 1.33 · #d8e9db
Silky MintΔE00 1.341 · #d7ecd9
Light Spring BurstΔE00 1.348 · #d6e8d5
Persian FableΔE00 1.423 · #d4ebdd

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