Cosmic Explorer
#551155
A magenta that is muted. It is dark — it carries white text and needs care with black.
Hex
#551155
RGB
85, 17, 85
OKLCh
32.7% 0.129 328.0°
CIELAB (D50)
19.9, 37.3, -24.5
What is true of this colour, and of no other
- 2 other named colours sit within ΔE00 2 of it.
- It uses 86% 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 98.5; 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 16.5 and 16.6 and 49.5 — no red cone.
Text on this colour
White text
13.14:1 — passes AA
Black text
1.60:1 — fails AA
White text is the better of the two at13.14:1. That is enough for body text.
The same colour, with one cone missing
As you see it
#551155
protanopia
#212155 · ΔE00 16.5
deuteranopia
#313154 · ΔE00 16.6
tritanopia
#3e3e00 · ΔE00 49.5
The twelve nearest named colours
Ranked by CIEDE2000 — perceptual distance, not hex arithmetic. The closest isPurple Velour at ΔE00 1.712: between 1 and 2 — a trained eye spots it when the two touch; nobody spots it across a room. What the numbers mean.
- Purple VelourΔE00 1.712 · #581a57
- Shani PurpleΔE00 1.938 · #4c1050
- Cloak and DaggerΔE00 2.103 · #550055
- Beaten PurpleΔE00 2.147 · #4e0550
- Christmas PurpleΔE00 2.291 · #4d084b
- Alien PurpleΔE00 3.096 · #490648
- Grape PurpleΔE00 3.186 · #5d1451
- Clear PlumΔE00 3.441 · #64005e
- ClairvoyantΔE00 4.192 · #480656
- Amygdala PurpleΔE00 4.202 · #69045f
- Velvet CosmosΔE00 4.223 · #441144
- Purple DreamerΔE00 4.257 · #660066
8 of these have no page of their own: pages exist for the 4,961 colours the dataset marks as good names.