Noble Plum
#871f78
A magenta that is saturated. It is mid — the hardest range to put text on, either colour struggles.
Hex
#871f78
RGB
135, 31, 120
OKLCh
44.4% 0.169 334.7°
CIELAB (D50)
32.9, 50.4, -26.0
What is true of this colour, and of no other
- One other named colour sits 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 87.8; on black, Lc -14.3. 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 22.1 and 21.4 and 59.3 — no red cone.
Text on this colour
White text
8.41:1 — passes AA
Black text
2.50:1 — fails AA
White text is the better of the two at8.41:1. That is enough for body text.
The same colour, with one cone missing
As you see it
#871f78
protanopia
#383878 · ΔE00 22.1
deuteranopia
#505076 · ΔE00 21.4
tritanopia
#646400 · ΔE00 59.3
The twelve nearest named colours
Ranked by CIEDE2000 — perceptual distance, not hex arithmetic. The closest isRoyal Purpleness at ΔE00 1.424: between 1 and 2 — a trained eye spots it when the two touch; nobody spots it across a room. What the numbers mean.
- Royal PurplenessΔE00 1.424 · #881177
- Mirage of VioletsΔE00 2.637 · #7b1c6e
- Hello Darkness My Old FriendΔE00 2.992 · #802280
- Veronica PurpleΔE00 3.124 · #7e3075
- PatriarchΔE00 3.396 · #800070
- Count’s WardrobeΔE00 3.656 · #772277
- Violet VixenΔE00 3.694 · #883377
- Vanishing NightΔE00 3.874 · #990088
- Violaceous GretiΔE00 3.937 · #881188
- Persian Luxury PurpleΔE00 3.937 · #990077
- Haunted PurpleΔE00 3.995 · #991177
- Mardi GrasΔE00 4.03 · #880085
7 of these have no page of their own: pages exist for the 4,961 colours the dataset marks as good names.