HueComb

Naga Viper Pepper

#ed292b

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

#ed292b

RGB

237, 41, 43

OKLCh

61.0% 0.228 27.0°

CIELAB (D50)

52.5, 71.8, 51.0

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 92% 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 67.3; on black, Lc -34.4. 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 41.6 and 46.9 and 51.7 — no red cone.

Text on this colour

White text

4.24:1 — large text only

Black text

4.95:1 — passes AA

Black text is the better of the two at4.95:1. That is enough for body text.

As text on white, it needs to change

#e82126 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

#ed292b

protanopia

#5f5f2e · ΔE00 41.6

deuteranopia

#8c8c11 · ΔE00 46.9

tritanopia

#afaf00 · 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 isKrasnyi Red at ΔE00 1.061: between 1 and 2 — a trained eye spots it when the two touch; nobody spots it across a room. What the numbers mean.

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