Nocturne
#344d58
A cyan that is nearly neutral — the hue shows only against a true grey. It is mid — the hardest range to put text on, either colour struggles.
Hex
#344d58
RGB
52, 77, 88
OKLCh
40.5% 0.036 227.2°
CIELAB (D50)
31.1, -7.5, -9.7
What is true of this colour, and of no other
- 10 other named colours sit within ΔE00 2 of it — this part of the space is crowded, and the names here are finer distinctions than most people make.
- It uses 46% of the chroma sRGB can show at this lightness and hue.
- As text on white it measures APCA Lc 90.5; on black, Lc -11.8. 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 12.8 and 15.0 — no red cone.
Text on this colour
White text
8.94:1 — passes AA
Black text
2.35:1 — fails AA
White text is the better of the two at8.94:1. That is enough for body text.
The same colour, with one cone missing
As you see it
#344d58
protanopia
#4b4b58 · ΔE00 11.9
deuteranopia
#474758 · ΔE00 12.8
tritanopia
#424280 · ΔE00 15.0
The twelve nearest named colours
Ranked by CIEDE2000 — perceptual distance, not hex arithmetic. The closest isSeaworthy at ΔE00 0.941: below 1.0 — an ordinary observer cannot tell these apart, even side by side. What the numbers mean.
- SeaworthyΔE00 0.941 · #314d58
- Iron HeadΔE00 1.03 · #344d56
- Sailor’s CoatΔE00 1.335 · #334b58
- Aircraft BlueΔE00 1.339 · #354f58
- Restless SeaΔE00 1.45 · #38515d
- Sea KelpΔE00 1.574 · #354a55
- Velvet EveningΔE00 1.661 · #33505e
- Mountain MidnightΔE00 1.768 · #385058
- Nocturne BlueΔE00 1.848 · #37525f
- Celtic RushΔE00 1.913 · #2e4c5b
- Galenite BlueΔE00 2.143 · #374b52
- Opera GlassesΔE00 2.198 · #365360
11 of these have no page of their own: pages exist for the 4,961 colours the dataset marks as good names.