Lava Stone
#3c4151
A neutral that has no useful hue — it reads as a grey. It is dark — it carries white text and needs care with black.
Hex
#3c4151
RGB
60, 65, 81
OKLCh
37.7% 0.028 271.4°
CIELAB (D50)
27.6, 1.0, -10.4
What is true of this colour, and of no other
- 4 other named colours sit within ΔE00 2 of it.
- It uses only 12% 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 93.6; on black, Lc -8.9. 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 6.2 — no blue cone.
Text on this colour
White text
10.16:1 — passes AA
Black text
2.07:1 — fails AA
White text is the better of the two at10.16:1. That is enough for body text.
The same colour, with one cone missing
As you see it
#3c4151
protanopia
#404051 · ΔE00 2.9
deuteranopia
#404051 · ΔE00 3.1
tritanopia
#3f3f5b · ΔE00 6.2
The twelve nearest named colours
Ranked by CIEDE2000 — perceptual distance, not hex arithmetic. The closest isMadonna at ΔE00 1.309: between 1 and 2 — a trained eye spots it when the two touch; nobody spots it across a room. What the numbers mean.
- MadonnaΔE00 1.309 · #3f4250
- Blue NightsΔE00 1.729 · #414657
- Indigo IronΔE00 1.894 · #393f4c
- Blue AshΔE00 1.922 · #414654
- Mountain FigΔE00 2.1 · #383c49
- Meteorite Black BlueΔE00 2.117 · #414756
- Black SapphireΔE00 2.267 · #434555
- Blueberry TartΔE00 2.275 · #3f4050
- InkblotΔE00 2.363 · #393f4b
- North Sea BlueΔE00 2.412 · #343c4c
- Indian InkΔE00 2.43 · #3c3f4a
- India InkΔE00 2.459 · #3c3d4c
10 of these have no page of their own: pages exist for the 4,961 colours the dataset marks as good names.