HueComb

Transfusion

#ea1833

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

#ea1833

RGB

234, 24, 51

OKLCh

59.7% 0.233 23.6°

CIELAB (D50)

50.9, 74.1, 44.9

What is true of this colour, and of no other

  • 7 other named colours sit within ΔE00 2 of it.
  • 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 68.8; on black, Lc -32.8. 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 40.8 and 47.9 and 53.9 — no red cone.

Text on this colour

White text

4.49:1 — large text only

Black text

4.68:1 — passes AA

Black text is the better of the two at4.68:1. That is enough for body text.

As text on white, it needs to change

#ea1833 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

#ea1833

protanopia

#595936 · ΔE00 40.8

deuteranopia

#888821 · ΔE00 47.9

tritanopia

#acac00 · 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 isBarberry at ΔE00 0.677: below 1.0 — an ordinary observer cannot tell these apart, even side by side. What the numbers mean.

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