HueComb

Silken Ruby

#e81320

A red that is about as vivid as sRGB can show at this lightness. It is mid — the hardest range to put text on, either colour struggles.

Hex

#e81320

RGB

232, 19, 32

OKLCh

59.0% 0.234 26.9°

CIELAB (D50)

50.1, 73.9, 54.1

What is true of this colour, and of no other

  • 11 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 uses 97% of the chroma sRGB can show at this lightness and hue — close enough to the boundary that a wider display would show it slightly more vividly.
  • As text on white it measures APCA Lc 69.6; on black, Lc -32.1. 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 42.1 and 47.1 and 51.7 — no red cone.

Text on this colour

White text

4.62:1 — passes AA

Black text

4.55:1 — passes AA

White text is the better of the two at4.62:1. That is enough for body text.

The same colour, with one cone missing

As you see it

#e81320

protanopia

#585824 · ΔE00 42.1

deuteranopia

#878700 · ΔE00 47.1

tritanopia

#aaaa00 · ΔE00 51.7

Run a whole palette through all three

The twelve nearest named colours

Ranked by CIEDE2000 — perceptual distance, not hex arithmetic. The closest isBlood Donor at ΔE00 0.655: below 1.0 — an ordinary observer cannot tell these apart, even side by side. What the numbers mean.

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