Obsidian
#445055
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
#445055
RGB
68, 80, 85
OKLCh
42.3% 0.017 224.9°
CIELAB (D50)
33.1, -4.0, -4.6
What is true of this colour, and of no other
- 5 other named colours sit within ΔE00 2 of it.
- It uses only 22% 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 88.7; on black, Lc -13.5. 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.
- protanopia and deuteranopia and tritanopia shift it by ΔE00 6.7 and 7.2 and 15.2 — no red cone.
Text on this colour
White text
8.32:1 — passes AA
Black text
2.52:1 — fails AA
White text is the better of the two at8.32:1. That is enough for body text.
The same colour, with one cone missing
As you see it
#445055
protanopia
#4f4f55 · ΔE00 6.7
deuteranopia
#4d4d55 · ΔE00 7.2
tritanopia
#4a4a6f · ΔE00 15.2
The twelve nearest named colours
Ranked by CIEDE2000 — perceptual distance, not hex arithmetic. The closest isHigh Salute at ΔE00 0.558: below 1.0 — an ordinary observer cannot tell these apart, even side by side. What the numbers mean.
- High SaluteΔE00 0.558 · #445056
- Descent Into the CatacombsΔE00 0.861 · #445155
- Country SkyΔE00 1.691 · #49545a
- Vermont SlateΔE00 1.752 · #48535a
- Lunar EclipseΔE00 1.995 · #415053
- Kimono GreyΔE00 2.057 · #3d4c51
- Slate CourtΔE00 2.09 · #465355
- AtomicΔE00 2.152 · #3d4b52
- Evening StormΔE00 2.157 · #465058
- ChimneyΔE00 2.167 · #4a5257
- Seared GreyΔE00 2.264 · #495157
- Dead ForestΔE00 2.328 · #434b4f
10 of these have no page of their own: pages exist for the 4,961 colours the dataset marks as good names.