HueComb

Ice Citadel

#b2f8f8

A cyan 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

#b2f8f8

RGB

178, 248, 248

OKLCh

93.3% 0.069 196.0°

CIELAB (D50)

93.0, -22.5, -7.4

What is true of this colour, and of no other

  • 3 other named colours sit within ΔE00 2 of it.
  • It uses 68% of the chroma sRGB can show at this lightness and hue.
  • As text on white it measures APCA Lc 9.1; on black, Lc -95.2. 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 20.5 and 22.3 and 24.0 — no red cone.

Text on this colour

White text

1.19:1 — fails AA

Black text

17.68:1 — passes AA

Black text is the better of the two at17.68:1. That is enough for body text.

As text on white, it needs to change

#3c8182 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

#b2f8f8

protanopia

#f1f1f8 · ΔE00 20.5

deuteranopia

#e6e6f9 · ΔE00 22.3

tritanopia

#d9d9ff · ΔE00 24.0

Run a whole palette through all three

The twelve nearest named colours

Ranked by CIEDE2000 — perceptual distance, not hex arithmetic. The closest isItalian Sky Blue at ΔE00 1.4: between 1 and 2 — a trained eye spots it when the two touch; nobody spots it across a room. What the numbers mean.

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