Mysterious Waters
#27454a
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
#27454a
RGB
39, 69, 74
OKLCh
36.9% 0.037 209.2°
CIELAB (D50)
27.1, -10.5, -6.7
What is true of this colour, and of no other
- 6 other named colours sit within ΔE00 2 of it.
- It uses 58% of the chroma sRGB can show at this lightness and hue.
- As text on white it measures APCA Lc 93.9; on black, Lc -8.7. 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 13.4 and 14.6 and 19.9 — no red cone.
Text on this colour
White text
10.31:1 — passes AA
Black text
2.04:1 — fails AA
White text is the better of the two at10.31:1. That is enough for body text.
The same colour, with one cone missing
As you see it
#27454a
protanopia
#42424a · ΔE00 13.4
deuteranopia
#3e3e4a · ΔE00 14.6
tritanopia
#383878 · ΔE00 19.9
The twelve nearest named colours
Ranked by CIEDE2000 — perceptual distance, not hex arithmetic. The closest isJapanese Indigo at ΔE00 0.666: below 1.0 — an ordinary observer cannot tell these apart, even side by side. What the numbers mean.
- Japanese IndigoΔE00 0.666 · #264348
- Ai IndigoΔE00 1.081 · #274447
- Everglade DeckΔE00 1.083 · #25464d
- Ponderosa PineΔE00 1.333 · #29494e
- Emerald ForestΔE00 1.348 · #224347
- Little MermaidΔE00 1.821 · #2d454a
- Blue HillΔE00 2.114 · #1e454d
- Dad’s CoupeΔE00 2.151 · #2f484e
- Bay Isle PointeΔE00 2.23 · #214048
- Delta GreenΔE00 2.248 · #2d4a4c
- Atlantic WavesΔE00 2.306 · #264243
- Pallasite BlueΔE00 2.328 · #314a4e
10 of these have no page of their own: pages exist for the 4,961 colours the dataset marks as good names.