HueComb

Catfish

#657d82

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

#657d82

RGB

101, 125, 130

OKLCh

57.3% 0.029 211.7°

CIELAB (D50)

50.6, -8.1, -5.8

What is true of this colour, and of no other

  • 6 other named colours sit within ΔE00 2 of it.
  • It uses only 29% 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 70.3; on black, Lc -31.4. 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 11.1 and 12.0 and 18.9 — no red cone.

Text on this colour

White text

4.37:1 — large text only

Black text

4.81:1 — passes AA

Black text is the better of the two at4.81:1. That is enough for body text.

As text on white, it needs to change

#637b80 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

#657d82

protanopia

#7b7b82 · ΔE00 11.1

deuteranopia

#777782 · ΔE00 12.0

tritanopia

#7272b3 · ΔE00 18.9

Run a whole palette through all three

The twelve nearest named colours

Ranked by CIEDE2000 — perceptual distance, not hex arithmetic. The closest isBlue Thunder at ΔE00 1.289: between 1 and 2 — a trained eye spots it when the two touch; nobody spots it across a room. 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.