Imperial Purple
#5b3167
A magenta that is muted. It is dark — it carries white text and needs care with black.
Hex
#5b3167
RGB
91, 49, 103
OKLCh
39.0% 0.100 318.4°
CIELAB (D50)
27.7, 26.8, -24.0
What is true of this colour, and of no other
- 3 other named colours sit within ΔE00 2 of it.
- It uses 53% of the chroma sRGB can show at this lightness and hue.
- As text on white it measures APCA Lc 93.2; on black, Lc -9.3. 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 12.4 and 12.2 and 48.4 — no red cone.
Text on this colour
White text
10.10:1 — passes AA
Black text
2.08:1 — fails AA
White text is the better of the two at10.10:1. That is enough for body text.
The same colour, with one cone missing
As you see it
#5b3167
protanopia
#383867 · ΔE00 12.4
deuteranopia
#414166 · ΔE00 12.2
tritanopia
#494900 · ΔE00 48.4
The twelve nearest named colours
Ranked by CIEDE2000 — perceptual distance, not hex arithmetic. The closest isLounge Violet at ΔE00 1.302: between 1 and 2 — a trained eye spots it when the two touch; nobody spots it across a room. What the numbers mean.
- Lounge VioletΔE00 1.302 · #5e336d
- Purple ProtégéΔE00 1.56 · #593569
- ImperialΔE00 1.56 · #602f6b
- Damson MauveΔE00 2.075 · #583563
- Kuwanomi PurpleΔE00 2.875 · #55295b
- HeartlessΔE00 2.978 · #623b70
- Purple SplendourΔE00 3.014 · #5e3b6a
- Purple MagicΔE00 3.086 · #653475
- PlumΔE00 3.257 · #66386a
- SeanceΔE00 3.264 · #69326e
- Passion RazzΔE00 3.328 · #59355e
- WineberryΔE00 3.386 · #663366
7 of these have no page of their own: pages exist for the 4,961 colours the dataset marks as good names.