Black Box
#0f282f
A cyan that is nearly neutral — the hue shows only against a true grey. It is dark — it carries white text and needs care with black.
Hex
#0f282f
RGB
15, 40, 47
OKLCh
26.0% 0.033 218.6°
CIELAB (D50)
14.4, -8.1, -7.7
What is true of this colour, and of no other
- 2 other named colours sit within ΔE00 2 of it.
- It uses 71% of the chroma sRGB can show at this lightness and hue.
- As text on white it measures APCA Lc 102.2; on black, Lc 0.0. 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 11.9 and 13.0 and 17.9 — no red cone.
Text on this colour
White text
15.39:1 — passes AA
Black text
1.36:1 — fails AA
White text is the better of the two at15.39:1. That is enough for body text.
The same colour, with one cone missing
As you see it
#0f282f
protanopia
#26262f · ΔE00 11.9
deuteranopia
#23232f · ΔE00 13.0
tritanopia
#1e1e4f · ΔE00 17.9
The twelve nearest named colours
Ranked by CIEDE2000 — perceptual distance, not hex arithmetic. The closest isBlack Chasm at ΔE00 1.431: between 1 and 2 — a trained eye spots it when the two touch; nobody spots it across a room. What the numbers mean.
- Black ChasmΔE00 1.431 · #102c33
- Sunken ShipΔE00 1.52 · #10252a
- Crow FeatherΔE00 2.167 · #102329
- DaintreeΔE00 2.513 · #012731
- Oceanic NoirΔE00 3.497 · #172b36
- Ore Bluish BlackΔE00 3.521 · #1c3339
- Elderberry BlackΔE00 3.98 · #1e323b
- Elite TealΔE00 4.452 · #133337
- Firmament BlueΔE00 4.496 · #11353f
- Black FeatherΔE00 4.553 · #112222
- Teal SpillΔE00 5.022 · #032425
- Dark Pine GreenΔE00 5.216 · #193232
9 of these have no page of their own: pages exist for the 4,961 colours the dataset marks as good names.