Quiet Harbour
#5a789a
A blue 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
#5a789a
RGB
90, 120, 154
OKLCh
56.3% 0.063 252.0°
CIELAB (D50)
49.1, -4.2, -22.1
What is true of this colour, and of no other
- 9 other named colours sit within ΔE00 2 of it.
- It uses only 38% 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 71.7; on black, Lc -29.9. 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 11.3 and 10.9 and 7.9 — no red cone.
Text on this colour
White text
4.58:1 — passes AA
Black text
4.59:1 — passes AA
Black text is the better of the two at4.59:1. That is enough for body text.
The same colour, with one cone missing
As you see it
#5a789a
protanopia
#75759a · ΔE00 11.3
deuteranopia
#70709a · ΔE00 10.9
tritanopia
#6b6bc8 · ΔE00 7.9
The twelve nearest named colours
Ranked by CIEDE2000 — perceptual distance, not hex arithmetic. The closest isBlue Plate at ΔE00 0.783: below 1.0 — an ordinary observer cannot tell these apart, even side by side. What the numbers mean.
- Blue PlateΔE00 0.783 · #5b7a9c
- Privileged EliteΔE00 1.152 · #597695
- Cocktail BlueΔE00 1.649 · #5a7aa2
- Rushing RiverΔE00 1.681 · #5f7797
- Montreux BlueΔE00 1.689 · #5879a2
- YawlΔE00 1.732 · #547497
- Glass SapphireΔE00 1.936 · #587b9b
- Clean SlateΔE00 1.973 · #577396
- TrusteeΔE00 1.999 · #527498
- Laguna BlueΔE00 2.28 · #5a7490
- Cropper BlueΔE00 2.332 · #5c7b97
- SecrecyΔE00 2.395 · #50759e
10 of these have no page of their own: pages exist for the 4,961 colours the dataset marks as good names.