Old Study

#431705

An orange that is nearly neutral — the hue shows only against a true grey. It is dark — it carries white text and needs care with black.

Hex

#431705

RGB

67, 23, 5

OKLCh

27.1% 0.074 41.3°

CIELAB (D50)

14.8, 20.9, 20.4

What is true of this colour, and of no other

  • 2 other named colours sit within ΔE00 2 of it.
  • It uses 89% 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 101.9; on black, Lc 0.0. 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 22.2 and 22.3 and 23.1 — no red cone.

Text on this colour

White text

15.40:1 — passes AA

Black text

1.36:1 — fails AA

White text is the better of the two at15.40:1. That is enough for body text.

The same colour, with one cone missing

As you see it

#431705

protanopia

#1f1f06 · ΔE00 22.2

deuteranopia

#292902 · ΔE00 22.3

tritanopia

#323200 · ΔE00 23.1

Run a whole palette through all three

The twelve nearest named colours

Ranked by CIEDE2000 — perceptual distance, not hex arithmetic. The closest isBarbecue Sauce at ΔE00 1.622: between 1 and 2 — a trained eye spots it when the two touch; nobody spots it across a room. 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.