Cloak and Dagger

#550055

A magenta that is muted. It is dark — it carries white text and needs care with black.

Hex

#550055

RGB

85, 0, 85

OKLCh

31.5% 0.145 328.4°

CIELAB (D50)

18.2, 42.0, -27.2

What is true of this colour, and of no other

  • One other named colour sits 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 98.9; 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 17.2 and 17.6 and 51.0 — no red cone.

Text on this colour

White text

13.84:1 — passes AA

Black text

1.52:1 — fails AA

White text is the better of the two at13.84:1. That is enough for body text.

The same colour, with one cone missing

As you see it

#550055

protanopia

#1a1a55 · ΔE00 17.2

deuteranopia

#2d2d54 · ΔE00 17.6

tritanopia

#3c3c00 · ΔE00 51.0

Run a whole palette through all three

The twelve nearest named colours

Ranked by CIEDE2000 — perceptual distance, not hex arithmetic. The closest isBeaten Purple at ΔE00 1.554: 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.