Neptune

#007dac

A blue that is muted. It is mid — the hardest range to put text on, either colour struggles.

Hex

#007dac

RGB

0, 125, 172

OKLCh

55.5% 0.116 233.8°

CIELAB (D50)

48.5, -16.5, -33.8

What is true of this colour, and of no other

  • 14 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 sits exactly on the sRGB boundary: at this lightness and hue the gamut has nothing left, and a wider display would show a more colourful version of it.
  • As text on white it measures APCA Lc 71.6; on black, Lc -30.1. 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 20.8 and 20.1 and 19.5 — no red cone.

Text on this colour

White text

4.64:1 — passes AA

Black text

4.53:1 — passes AA

White text is the better of the two at4.64:1. That is enough for body text.

The same colour, with one cone missing

As you see it

#007dac

protanopia

#7676ac · ΔE00 20.8

deuteranopia

#6a6aad · ΔE00 20.1

tritanopia

#5b5bff · ΔE00 19.5

Run a whole palette through all three

The twelve nearest named colours

Ranked by CIEDE2000 — perceptual distance, not hex arithmetic. The closest isJacuzzi at ΔE00 0.477: below 1.0 — an ordinary observer cannot tell these apart, even side by side. What the numbers mean.

  • JacuzziΔE00 0.477 · #007cac
  • BenitoiteΔE00 0.742 · #007baa
  • Turkish BlueΔE00 0.743 · #007fae
  • CapstanΔE00 0.879 · #007eb0
  • Celadon BlueΔE00 1.093 · #007ba7
  • Quiet CoveΔE00 1.344 · #017aa6
  • Blue VacationΔE00 1.381 · #1e7eae
  • Blue Bird DayΔE00 1.464 · #237fac
  • Sixties BlueΔE00 1.525 · #0079a9
  • CG BlueΔE00 1.541 · #007aa5
  • Oh so VoΔE00 1.632 · #0180ab
  • Prominent BlueΔE00 1.822 · #2b7da6

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