Mother Nature

#bde1c4

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

#bde1c4

RGB

189, 225, 196

OKLCh

87.6% 0.055 150.8°

CIELAB (D50)

86.3, -16.4, 10.1

What is true of this colour, and of no other

11 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 23% 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 20.4; on black, Lc -83.0. 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 12.2 and 12.7 and 29.0 — no red cone.

Text on this colour

White text

1.43:1 — fails AA

Black text

14.73:1 — passes AA

Black text is the better of the two at14.73:1. That is enough for body text.

As text on white, it needs to change

#5e7e65 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

#bde1c4

protanopia

#ddddc4 · ΔE00 12.2

deuteranopia

#d7d7c5 · ΔE00 12.7

tritanopia

#d0d0ff · ΔE00 29.0

Run a whole palette through all three

The twelve nearest named colours

Ranked by CIEDE2000 — perceptual distance, not hex arithmetic. The closest isSugar Mint at ΔE00 0.622: below 1.0 — an ordinary observer cannot tell these apart, even side by side. What the numbers mean.

Sugar MintΔE00 0.622 · #c0e2c5
Lattice WorkΔE00 1.07 · #b9e1c2
SpearmintsΔE00 1.392 · #bce3c9
Ice MistΔE00 1.498 · #b6dbbf
Pallid GreenΔE00 1.592 · #c1e0c1
Sprite TwistΔE00 1.608 · #b9dcc3
Soft GrassΔE00 1.63 · #c1dfc4
Granny AppleΔE00 1.811 · #c5e7cd
Wintergreen MintΔE00 1.82 · #c6e5ca
Luna GreenΔE00 1.876 · #c1e0c8
Spirited GreenΔE00 1.97 · #bddec7
Cuddle BugΔE00 2.224 · #c1e0be

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