HueComb

Boulevardier

#d40701

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

#d40701

RGB

212, 7, 1

OKLCh

54.8% 0.223 29.5°

CIELAB (D50)

45.4, 69.7, 60.5

What is true of this colour, and of no other

  • 21 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 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 74.6; on black, Lc -27.1. 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 41.0 and 43.4 and 48.1 — no red cone.

Text on this colour

White text

5.48:1 — passes AA

Black text

3.83:1 — large text only

White text is the better of the two at5.48:1. That is enough for body text.

The same colour, with one cone missing

As you see it

#d40701

protanopia

#4e4e0a · ΔE00 41.0

deuteranopia

#7a7a00 · ΔE00 43.4

tritanopia

#9b9b00 · ΔE00 48.1

Run a whole palette through all three

The twelve nearest named colours

Ranked by CIEDE2000 — perceptual distance, not hex arithmetic. The closest isHot Fever at ΔE00 0.173: below 1.0 — an ordinary observer cannot tell these apart, even side by side. 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.