HueComb

Heat Signature

#e3000e

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

#e3000e

RGB

227, 0, 14

OKLCh

57.6% 0.235 28.2°

CIELAB (D50)

48.4, 74.1, 59.9

What is true of this colour, and of no other

  • 20 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 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 71.1; on black, Lc -30.6. 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 42.4 and 45.7 and 50.4 — no red cone.

Text on this colour

White text

4.92:1 — passes AA

Black text

4.27:1 — large text only

White text is the better of the two at4.92:1. That is enough for body text.

The same colour, with one cone missing

As you see it

#e3000e

protanopia

#535315 · ΔE00 42.4

deuteranopia

#828200 · ΔE00 45.7

tritanopia

#a6a600 · ΔE00 50.4

Run a whole palette through all three

The twelve nearest named colours

Ranked by CIEDE2000 — perceptual distance, not hex arithmetic. The closest isMario at ΔE00 0.245: below 1.0 — an ordinary observer cannot tell these apart, even side by side. What the numbers mean.

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