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#acdcee

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

#acdcee

RGB

172, 220, 238

OKLCh

86.7% 0.056 222.8°

CIELAB (D50)

84.8, -13.1, -14.2

What is true of this colour, and of no other

  • 17 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 61% of the chroma sRGB can show at this lightness and hue.
  • As text on white it measures APCA Lc 22.5; on black, Lc -80.8. 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 17.4 and 18.0 and 17.8 — no red cone.

Text on this colour

White text

1.48:1 — fails AA

Black text

14.23:1 — passes AA

Black text is the better of the two at14.23:1. That is enough for body text.

As text on white, it needs to change

#507d8d 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

#acdcee

protanopia

#d7d7ee · ΔE00 17.4

deuteranopia

#cfcfef · ΔE00 18.0

tritanopia

#c6c6ff · ΔE00 17.8

Run a whole palette through all three

The twelve nearest named colours

Ranked by CIEDE2000 — perceptual distance, not hex arithmetic. The closest isSpring Shower at ΔE00 0.223: below 1.0 — an ordinary observer cannot tell these apart, even side by side. What the numbers mean.

  • Spring ShowerΔE00 0.223 · #abdcee
  • Van Gogh BlueΔE00 0.693 · #abddf1
  • Lady-In-WaitingΔE00 0.698 · #aedcec
  • Whimsy BlueΔE00 0.857 · #b0dced
  • Mizu CyanΔE00 0.944 · #a7dbed
  • Blue ClickΔE00 1.314 · #a7d8e8
  • Blue BubbleΔE00 1.371 · #a6d7eb
  • Blue FeatherΔE00 1.415 · #aed9ec
  • Intergalactic BlueΔE00 1.468 · #afe0ef
  • Soap BubbleΔE00 1.591 · #b2dcef
  • Light BlueΔE00 1.683 · #add8e6
  • Azure SkyΔE00 1.71 · #b0e0f6

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