Calcium Rock

#eee9d9

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

#eee9d9

RGB

238, 233, 217

OKLCh

93.4% 0.022 92.5°

CIELAB (D50)

92.4, -0.3, 8.4

What is true of this colour, and of no other

  • 153 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 23% 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 10.5; on black, Lc -93.5. 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.
  • tritanopia shifts it by ΔE00 7.2 — no blue cone.

Text on this colour

White text

1.21:1 — fails AA

Black text

17.29:1 — passes AA

Black text is the better of the two at17.29:1. That is enough for body text.

As text on white, it needs to change

#7b7768 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

#eee9d9

protanopia

#eaead9 · ΔE00 2.5

deuteranopia

#eaead9 · ΔE00 2.6

tritanopia

#ebebc7 · ΔE00 7.2

Run a whole palette through all three

The twelve nearest named colours

Ranked by CIEDE2000 — perceptual distance, not hex arithmetic. The closest isPale Quartz at ΔE00 0.214: below 1.0 — an ordinary observer cannot tell these apart, even side by side. What the numbers mean.

  • Pale QuartzΔE00 0.214 · #efeada
  • Pearly SwirlyΔE00 0.385 · #eee9d8
  • Light FrostΔE00 0.451 · #ede8d7
  • Milk PaintΔE00 0.505 · #efe9d9
  • Nesting DoveΔE00 0.531 · #eeeada
  • Ivory SteamΔE00 0.566 · #f0eada
  • Restful WhiteΔE00 0.585 · #eee8d7
  • Frank Lloyd WhiteΔE00 0.632 · #efebdb
  • Homoeopathic YellowΔE00 0.634 · #ede7d7
  • Cotton RidgeΔE00 0.69 · #f1ebdb
  • Buttery WhiteΔE00 0.715 · #f1ebda
  • EdelweissΔE00 0.728 · #eee8d9

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