HueComb

Crystal

#a7d8de

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

#a7d8de

RGB

167, 216, 222

OKLCh

85.0% 0.051 205.5°

CIELAB (D50)

83.0, -15.4, -8.4

What is true of this colour, and of no other

  • 20 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 only 35% of the chroma available at this lightness and hue — there is a far more vivid version of this colour inside sRGB.
  • As text on white it measures APCA Lc 25.4; on black, Lc -77.7. 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 17.3 and 18.6 and 21.4 — no red cone.

Text on this colour

White text

1.55:1 — fails AA

Black text

13.52:1 — passes AA

Black text is the better of the two at13.52:1. That is enough for body text.

As text on white, it needs to change

#507e84 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

#a7d8de

protanopia

#d3d3de · ΔE00 17.3

deuteranopia

#cbcbdf · ΔE00 18.6

tritanopia

#c2c2ff · ΔE00 21.4

Run a whole palette through all three

The twelve nearest named colours

Ranked by CIEDE2000 — perceptual distance, not hex arithmetic. The closest isRapture Blue at ΔE00 0.766: below 1.0 — an ordinary observer cannot tell these apart, even side by side. What the numbers mean.

  • Rapture BlueΔE00 0.766 · #a7d6dd
  • Geyser PoolΔE00 0.959 · #a9dce2
  • Iced AquaΔE00 1.186 · #a7d4d9
  • Winsome HueΔE00 1.189 · #a7d8e1
  • Ice PackΔE00 1.236 · #a5dbe3
  • Terrace PoolΔE00 1.293 · #a1d8e0
  • Midwinter MistΔE00 1.317 · #a5d4dc
  • VandermintΔE00 1.394 · #abdee4
  • Clear WaterΔE00 1.432 · #aad5db
  • Blue BaubleΔE00 1.464 · #abdee3
  • Sky CloudΔE00 1.487 · #addee5
  • Daly WatersΔE00 1.51 · #afdadf

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