Royal Neptune
#1c3b42
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
#1c3b42
RGB
28, 59, 66
OKLCh
33.2% 0.039 214.1°
CIELAB (D50)
22.7, -10.2, -8.1
What is true of this colour, and of no other
- 2 other named colours sit within ΔE00 2 of it.
- It uses 66% of the chroma sRGB can show at this lightness and hue.
- As text on white it measures APCA Lc 97.3; 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 13.7 and 14.9 and 18.7 — no red cone.
Text on this colour
White text
11.98:1 — passes AA
Black text
1.75:1 — fails AA
White text is the better of the two at11.98:1. That is enough for body text.
The same colour, with one cone missing
As you see it
#1c3b42
protanopia
#383842 · ΔE00 13.7
deuteranopia
#343442 · ΔE00 14.9
tritanopia
#2f2f6c · ΔE00 18.7
The twelve nearest named colours
Ranked by CIEDE2000 — perceptual distance, not hex arithmetic. The closest isSunken Harbour at ΔE00 0.761: below 1.0 — an ordinary observer cannot tell these apart, even side by side. What the numbers mean.
- Sunken HarbourΔE00 0.761 · #1c3d44
- Bay Isle PointeΔE00 1.685 · #214048
- NordicΔE00 2.167 · #1d393c
- Firmament BlueΔE00 2.482 · #11353f
- Ghostlands CoalΔE00 2.712 · #113c42
- Japanese IndigoΔE00 2.794 · #264348
- Astral NomadΔE00 2.87 · #203943
- Winter WavesΔE00 2.939 · #21424d
- Ore Bluish BlackΔE00 3.091 · #1c3339
- Emerald ForestΔE00 3.104 · #224347
- Elite TealΔE00 3.116 · #133337
- Mysterious WatersΔE00 3.371 · #27454a
7 of these have no page of their own: pages exist for the 4,961 colours the dataset marks as good names.