Velvet Vortex
#540d6e
A magenta that is saturated. It is dark — it carries white text and needs care with black.
Hex
#540d6e
RGB
84, 13, 110
OKLCh
34.1% 0.155 314.2°
CIELAB (D50)
20.9, 42.0, -39.5
What is true of this colour, and of no other
- No other named colour in the set is within ΔE00 2 of it — it stands alone.
- It uses 92% 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 97.4; 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 13.5 and 14.1 and 53.8 — no red cone.
Text on this colour
White text
12.65:1 — passes AA
Black text
1.66:1 — fails AA
White text is the better of the two at12.65:1. That is enough for body text.
The same colour, with one cone missing
As you see it
#540d6e
protanopia
#1f1f6e · ΔE00 13.5
deuteranopia
#2f2f6d · ΔE00 14.1
tritanopia
#3c3c00 · ΔE00 53.8
The twelve nearest named colours
Ranked by CIEDE2000 — perceptual distance, not hex arithmetic. The closest isGod of Nights at ΔE00 2.231: between 2 and 5 — clearly two colours when compared, easily mistaken from memory. What the numbers mean.
- God of NightsΔE00 2.231 · #550066
- Royal PurpleΔE00 2.696 · #4b006e
- Obsidian ShellΔE00 3.423 · #441166
- Zeus PurpleΔE00 3.659 · #660077
- Deep Daitoku PurpleΔE00 3.776 · #661177
- ViolethargicΔE00 3.86 · #5a226f
- ClairvoyantΔE00 4.526 · #480656
- Elegant Purple GownΔE00 4.607 · #552367
- Peaceful PurpleΔE00 4.681 · #660088
- ExtravioletΔE00 4.762 · #661188
- Ripe PlumΔE00 4.93 · #410056
- Berry BlackmailΔE00 5.093 · #662277
9 of these have no page of their own: pages exist for the 4,961 colours the dataset marks as good names.