3AM in Shibuya

#225577

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

#225577

RGB

34, 85, 119

OKLCh

43.1% 0.078 241.2°

CIELAB (D50)

34.0, -8.4, -24.8

What is true of this colour, and of no other

  • 8 other named colours sit within ΔE00 2 of it.
  • It uses 78% of the chroma sRGB can show at this lightness and hue.
  • As text on white it measures APCA Lc 87.4; on black, Lc -14.7. 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 15.3 and 14.5 and 12.1 — no red cone.

Text on this colour

White text

7.97:1 — passes AA

Black text

2.63:1 — fails AA

White text is the better of the two at7.97:1. That is enough for body text.

The same colour, with one cone missing

As you see it

#225577

protanopia

#515177 · ΔE00 15.3

deuteranopia

#4a4a78 · ΔE00 14.5

tritanopia

#4242ab · ΔE00 12.1

Run a whole palette through all three

The twelve nearest named colours

Ranked by CIEDE2000 — perceptual distance, not hex arithmetic. The closest isMidnight Sonata at ΔE00 0.71: below 1.0 — an ordinary observer cannot tell these apart, even side by side. What the numbers mean.

  • Midnight SonataΔE00 0.71 · #225374
  • Royal BreezeΔE00 0.846 · #275779
  • Queen of the NightΔE00 1.156 · #295776
  • Sea HunterΔE00 1.278 · #245878
  • Venice BlueΔE00 1.43 · #2c5778
  • Heavy BlueΔE00 1.456 · #2c5674
  • SacrificeΔE00 1.649 · #2a5774
  • Bahama BlueΔE00 1.763 · #25597f
  • Mountain LakeΔE00 2.308 · #2d5975
  • Ocean SprayΔE00 2.341 · #005379
  • Blueberry TwistΔE00 2.362 · #24547d
  • Real MccoyΔE00 2.498 · #00577e

12 of these have no page of their own: pages exist for the 4,961 colours the dataset marks as good names.