Paolo Veronese Green

#009b7d

A cyan that is muted. It is light — black text sits on it comfortably, white text does not.

Hex

#009b7d

RGB

0, 155, 125

OKLCh

61.4% 0.118 172.5°

CIELAB (D50)

56.8, -41.7, 5.5

What is true of this colour, and of no other

4 other named colours sit within ΔE00 2 of it.
It sits exactly on the sRGB boundary: at this lightness and hue the gamut has nothing left, and a wider display would show a more colourful version of it.
As text on white it measures APCA Lc 62.0; on black, Lc -39.7. 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 22.3 and 23.4 and 41.9 — no red cone.

Text on this colour

White text

3.51:1 — large text only

Black text

5.98:1 — passes AA

Black text is the better of the two at5.98:1. That is enough for body text.

As text on white, it needs to change

#00876c is the nearest colour of the same hue that passes AA on white, at 4.50:1. Only the lightness moved, and some saturation was given up to stay inside sRGB.

Try it against your own background

The same colour, with one cone missing

As you see it

#009b7d

protanopia

#93937d · ΔE00 22.3

deuteranopia

#84847f · ΔE00 23.4

tritanopia

#7171ff · ΔE00 41.9

Run a whole palette through all three

The twelve nearest named colours

Ranked by CIEDE2000 — perceptual distance, not hex arithmetic. The closest isTropical Kelp at ΔE00 0.822: below 1.0 — an ordinary observer cannot tell these apart, even side by side. What the numbers mean.

Tropical KelpΔE00 0.822 · #009d7d
Reptilian GreenΔE00 1.247 · #009e82
CadaverousΔE00 1.49 · #009977
Pool TableΔE00 1.98 · #039578
Golf GreenΔE00 2.399 · #009b75
JardinièreΔE00 2.484 · #019a74
Green JellyΔE00 2.488 · #349b82
Holly GreenΔE00 2.75 · #0f9d76
Sport GreenΔE00 2.809 · #00a27d
Congo GreenΔE00 2.877 · #00a483
Dòu Lǜ GreenΔE00 3.012 · #009276
Free Speech AquamarineΔE00 3.207 · #029d74

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