Inkblot
#393f4b
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
#393f4b
RGB
57, 63, 75
OKLCh
36.7% 0.022 264.3°
CIELAB (D50)
26.4, -0.3, -8.2
What is true of this colour, and of no other
- 5 other named colours sit within ΔE00 2 of it.
- It uses only 9% 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 94.5; on black, Lc -8.1. 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 8.1 — no blue cone.
Text on this colour
White text
10.57:1 — passes AA
Black text
1.99:1 — fails AA
White text is the better of the two at10.57:1. That is enough for body text.
The same colour, with one cone missing
As you see it
#393f4b
protanopia
#3e3e4b · ΔE00 3.6
deuteranopia
#3d3d4b · ΔE00 3.9
tritanopia
#3c3c58 · ΔE00 8.1
The twelve nearest named colours
Ranked by CIEDE2000 — perceptual distance, not hex arithmetic. The closest isIndigo Iron at ΔE00 0.519: below 1.0 — an ordinary observer cannot tell these apart, even side by side. What the numbers mean.
- Indigo IronΔE00 0.519 · #393f4c
- Indian InkΔE00 1.632 · #3c3f4a
- Mountain FigΔE00 1.645 · #383c49
- Astrogranite DebrisΔE00 1.648 · #3b424c
- Dark CryptΔE00 1.989 · #3f4551
- North Sea BlueΔE00 2.179 · #343c4c
- Lava StoneΔE00 2.363 · #3c4151
- IntellectualΔE00 2.391 · #3f414c
- Do Not DisturbΔE00 2.409 · #363b43
- Bank BlueΔE00 2.439 · #3e4652
- Starlit EveΔE00 2.532 · #384351
- MadonnaΔE00 2.541 · #3f4250
8 of these have no page of their own: pages exist for the 4,961 colours the dataset marks as good names.