HueComb

Castle in the Sky

#d1eaed

A neutral that has no useful hue — it reads as a grey. It is very light — it works as a page background, not as text.

Hex

#d1eaed

RGB

209, 234, 237

OKLCh

92.0% 0.027 205.4°

CIELAB (D50)

90.9, -8.1, -4.4

What is true of this colour, and of no other

  • 23 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 32% 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 12.8; on black, Lc -91.2. 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 10.6 and 11.4 and 16.3 — no red cone.

Text on this colour

White text

1.26:1 — fails AA

Black text

16.70:1 — passes AA

Black text is the better of the two at16.70:1. That is enough for body text.

As text on white, it needs to change

#647b7e 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

#d1eaed

protanopia

#e7e7ed · ΔE00 10.6

deuteranopia

#e3e3ee · ΔE00 11.4

tritanopia

#dedeff · ΔE00 16.3

Run a whole palette through all three

The twelve nearest named colours

Ranked by CIEDE2000 — perceptual distance, not hex arithmetic. The closest isJet d’Eau at ΔE00 0.446: below 1.0 — an ordinary observer cannot tell these apart, even side by side. 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.