HueComb

Racing Red

#c21727

A red that is saturated. It is mid — the hardest range to put text on, either colour struggles.

Hex

#c21727

RGB

194, 23, 39

OKLCh

52.1% 0.200 24.5°

CIELAB (D50)

42.4, 63.6, 40.1

What is true of this colour, and of no other

  • 13 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 95% 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 78.3; on black, Lc -23.4. 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 37.2 and 43.6 and 49.2 — no red cone.

Text on this colour

White text

6.09:1 — passes AA

Black text

3.45:1 — large text only

White text is the better of the two at6.09:1. That is enough for body text.

The same colour, with one cone missing

As you see it

#c21727

protanopia

#4a4a29 · ΔE00 37.2

deuteranopia

#717117 · ΔE00 43.6

tritanopia

#8e8e00 · ΔE00 49.2

Run a whole palette through all three

The twelve nearest named colours

Ranked by CIEDE2000 — perceptual distance, not hex arithmetic. The closest isRed City of Morocco at ΔE00 0.996: 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.