HueComb

Crimson Glow

#c13939

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

Hex

#c13939

RGB

193, 57, 57

OKLCh

54.7% 0.173 24.9°

CIELAB (D50)

45.7, 54.6, 33.1

What is true of this colour, and of no other

  • 13 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 78% of the chroma sRGB can show at this lightness and hue.
  • As text on white it measures APCA Lc 75.6; on black, Lc -26.2. 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 34.2 and 40.0 and 47.0 — no red cone.

Text on this colour

White text

5.37:1 — passes AA

Black text

3.91:1 — large text only

White text is the better of the two at5.37:1. That is enough for body text.

The same colour, with one cone missing

As you see it

#c13939

protanopia

#57573a · ΔE00 34.2

deuteranopia

#777730 · ΔE00 40.0

tritanopia

#919100 · ΔE00 47.0

Run a whole palette through all three

The twelve nearest named colours

Ranked by CIEDE2000 — perceptual distance, not hex arithmetic. The closest isAurora Red at ΔE00 0.912: 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.