Matterhorn
#524b4b
A neutral that has no useful hue — it reads as a grey. It is mid — the hardest range to put text on, either colour struggles.
Hex
#524b4b
RGB
82, 75, 75
OKLCh
42.0% 0.009 17.5°
CIELAB (D50)
32.6, 3.0, 1.1
What is true of this colour, and of no other
- 5 other named colours sit within ΔE00 2 of it.
- It uses only 6% 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 89.3; on black, Lc -12.9. 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 15.9 — no blue cone.
Text on this colour
White text
8.51:1 — passes AA
Black text
2.47:1 — fails AA
White text is the better of the two at8.51:1. That is enough for body text.
The same colour, with one cone missing
As you see it
#524b4b
protanopia
#4c4c4b · ΔE00 4.4
deuteranopia
#4d4d4b · ΔE00 4.8
tritanopia
#4f4f2f · ΔE00 15.9
The twelve nearest named colours
Ranked by CIEDE2000 — perceptual distance, not hex arithmetic. The closest isUnderground Civilization at ΔE00 0.589: below 1.0 — an ordinary observer cannot tell these apart, even side by side. What the numbers mean.
- Underground CivilizationΔE00 0.589 · #524b4c
- Off the Beaten PathΔE00 0.678 · #534c4b
- EmperorΔE00 0.888 · #50494a
- Black EleganceΔE00 1.613 · #50484a
- MortarΔE00 1.843 · #565051
- Keshizumi CinderΔE00 2.068 · #524e4d
- Espresso MacchiatoΔE00 2.257 · #4f4744
- Périgord TruffleΔE00 2.392 · #524a46
- Bastion GreyΔE00 2.415 · #4d4a4a
- Willow WoodΔE00 2.487 · #58504d
- Black BeanΔE00 2.516 · #4e4b4a
- Charadon GraniteΔE00 2.523 · #504d4c
10 of these have no page of their own: pages exist for the 4,961 colours the dataset marks as good names.