HueComb

Hot Flamin Chilli

#dd180e

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

#dd180e

RGB

221, 24, 14

OKLCh

57.0% 0.225 29.4°

CIELAB (D50)

48.0, 70.2, 58.8

What is true of this colour, and of no other

  • 26 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 96% 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 72.1; on black, Lc -29.5. 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 41.3 and 44.4 and 48.9 — no red cone.

Text on this colour

White text

4.99:1 — passes AA

Black text

4.21:1 — large text only

White text is the better of the two at4.99:1. That is enough for body text.

The same colour, with one cone missing

As you see it

#dd180e

protanopia

#545415 · ΔE00 41.3

deuteranopia

#818100 · ΔE00 44.4

tritanopia

#a2a200 · ΔE00 48.9

Run a whole palette through all three

The twelve nearest named colours

Ranked by CIEDE2000 — perceptual distance, not hex arithmetic. The closest isRed Wrath of Zeus at ΔE00 0.722: below 1.0 — an ordinary observer cannot tell these apart, even side by side. What the numbers mean.

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