HueComb

Crimson Velvet Sunset

#b52604

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

Hex

#b52604

RGB

181, 38, 4

OKLCh

50.3% 0.183 33.1°

CIELAB (D50)

40.7, 56.0, 53.1

What is true of this colour, and of no other

  • 6 other named colours sit within ΔE00 2 of it.
  • 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 80.5; on black, Lc -21.4. 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 36.2 and 38.4 and 42.1 — no red cone.

Text on this colour

White text

6.47:1 — passes AA

Black text

3.24:1 — large text only

White text is the better of the two at6.47:1. That is enough for body text.

The same colour, with one cone missing

As you see it

#b52604

protanopia

#4a4a0a · ΔE00 36.2

deuteranopia

#6c6c00 · ΔE00 38.4

tritanopia

#868600 · ΔE00 42.1

Run a whole palette through all three

The twelve nearest named colours

Ranked by CIEDE2000 — perceptual distance, not hex arithmetic. The closest isRavishing Rouge at ΔE00 1.129: 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.