Herbal

#29ab87

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

Hex

#29ab87

RGB

41, 171, 135

OKLCh

66.4% 0.122 169.4°

CIELAB (D50)

62.6, -42.4, 8.3

What is true of this colour, and of no other

5 other named colours sit within ΔE00 2 of it.
It uses 92% of the chroma sRGB can show at this lightness and hue — close enough to the boundary that a wider display would show it slightly more vividly.
As text on white it measures APCA Lc 54.7; on black, Lc -47.1. 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 22.0 and 22.7 and 42.0 — no red cone.

Text on this colour

White text

2.89:1 — fails AA

Black text

7.27:1 — passes AA

Black text is the better of the two at7.27:1. That is enough for body text.

As text on white, it needs to change

#008768 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

#29ab87

protanopia

#a3a387 · ΔE00 22.0

deuteranopia

#949489 · ΔE00 22.7

tritanopia

#8080ff · ΔE00 42.0

Run a whole palette through all three

The twelve nearest named colours

Ranked by CIEDE2000 — perceptual distance, not hex arithmetic. The closest isGumdrop Green at ΔE00 1.239: between 1 and 2 — a trained eye spots it when the two touch; nobody spots it across a room. What the numbers mean.

Gumdrop GreenΔE00 1.239 · #2ea785
Wells of WonderΔE00 1.461 · #26ad8d
Mermaid SongΔE00 1.655 · #25ae8e
Simply GreenΔE00 1.695 · #00aa81
NiagaraΔE00 1.796 · #29a98b
Walk in the WoodsΔE00 2.055 · #3bb08f
ArcadiaΔE00 2.177 · #00ac8d
Active GreenΔE00 2.289 · #00a67e
HobgoblinΔE00 2.505 · #01ad8f
Congo GreenΔE00 2.661 · #00a483
Victorian GreenhouseΔE00 2.672 · #00b191
Chromophobia GreenΔE00 2.777 · #06b48b

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