HueComb

Blue Blood

#6b7f81

A neutral that has no useful hue — it reads as a grey. It is mid — the hardest range to put text on, either colour struggles.

Hex

#6b7f81

RGB

107, 127, 129

OKLCh

58.1% 0.024 203.9°

CIELAB (D50)

51.6, -7.2, -3.7

What is true of this colour, and of no other

  • 5 other named colours sit within ΔE00 2 of it.
  • It uses only 24% 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 69.1; on black, Lc -32.5. 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 9.6 and 10.4 and 19.7 — no red cone.

Text on this colour

White text

4.22:1 — large text only

Black text

4.98:1 — passes AA

Black text is the better of the two at4.98:1. That is enough for body text.

As text on white, it needs to change

#667a7c is the nearest colour of the same hue that passes AA on white, at 4.50:1. Only the lightness moved.

Try it against your own background

The same colour, with one cone missing

As you see it

#6b7f81

protanopia

#7d7d81 · ΔE00 9.6

deuteranopia

#7a7a81 · ΔE00 10.4

tritanopia

#7676ad · ΔE00 19.7

Run a whole palette through all three

The twelve nearest named colours

Ranked by CIEDE2000 — perceptual distance, not hex arithmetic. The closest isStormy Sea at ΔE00 0.928: below 1.0 — an ordinary observer cannot tell these apart, even side by side. What the numbers mean.

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