HueComb

Primal Rage

#f4301c

A red that is about as vivid as sRGB can show at this lightness. It is light — black text sits on it comfortably, white text does not.

Hex

#f4301c

RGB

244, 48, 28

OKLCh

62.6% 0.231 30.3°

CIELAB (D50)

54.4, 71.9, 60.0

What is true of this colour, and of no other

  • 16 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 93% 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 65.1; on black, Lc -36.5. 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 42.6 and 45.8 and 49.9 — no red cone.

Text on this colour

White text

3.97:1 — large text only

Black text

5.29:1 — passes AA

Black text is the better of the two at5.29:1. That is enough for body text.

As text on white, it needs to change

#e9200a is the nearest colour of the same hue that passes AA on white, at 4.50:1. Only the lightness moved.

Try it against your own background

The same colour, with one cone missing

As you see it

#f4301c

protanopia

#646421 · ΔE00 42.6

deuteranopia

#929200 · ΔE00 45.8

tritanopia

#b5b500 · ΔE00 49.9

Run a whole palette through all three

The twelve nearest named colours

Ranked by CIEDE2000 — perceptual distance, not hex arithmetic. The closest isRaspberry Rave at ΔE00 1.008: between 1 and 2 — a trained eye spots it when the two touch; nobody spots it across a room. 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.