HueComb

Seaweed

#18d17b

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

Hex

#18d17b

RGB

24, 209, 123

OKLCh

75.8% 0.183 155.1°

CIELAB (D50)

74.3, -58.8, 30.2

What is true of this colour, and of no other

  • One other named colour sits within ΔE00 2 of it.
  • It uses 98% 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 38.4; on black, Lc -64.0. 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 23.6 and 23.0 and 48.7 — no red cone.

Text on this colour

White text

2.01:1 — fails AA

Black text

10.45:1 — passes AA

Black text is the better of the two at10.45:1. That is enough for body text.

As text on white, it needs to change

#00894d 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

#18d17b

protanopia

#c6c67a · ΔE00 23.6

deuteranopia

#b4b47f · ΔE00 23.0

tritanopia

#9b9bff · ΔE00 48.7

Run a whole palette through all three

The twelve nearest named colours

Ranked by CIEDE2000 — perceptual distance, not hex arithmetic. The closest isUnderwater Fern at ΔE00 0.484: below 1.0 — an ordinary observer cannot tell these apart, even side by side. What the numbers mean.

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