HueComb

Blood Burst

#ff474c

A red that is saturated. It is light — black text sits on it comfortably, white text does not.

Hex

#ff474c

RGB

255, 71, 76

OKLCh

66.7% 0.220 24.1°

CIELAB (D50)

59.2, 69.7, 41.0

What is true of this colour, and of no other

  • 4 other named colours sit within ΔE00 2 of it.
  • 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 59.6; on black, Lc -42.1. 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 39.7 and 46.6 and 53.9 — no red cone.

Text on this colour

White text

3.36:1 — large text only

Black text

6.26:1 — passes AA

Black text is the better of the two at6.26:1. That is enough for body text.

As text on white, it needs to change

#e42836 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

#ff474c

protanopia

#72724e · ΔE00 39.7

deuteranopia

#9d9d40 · ΔE00 46.6

tritanopia

#c0c000 · ΔE00 53.9

Run a whole palette through all three

The twelve nearest named colours

Ranked by CIEDE2000 — perceptual distance, not hex arithmetic. The closest isSunburnt Cyclops at ΔE00 1.187: between 1 and 2 — a trained eye spots it when the two touch; nobody spots it across a room. What the numbers mean.

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