Conversions, palettes, contrast & design ideas for this color.
Color profile
#B51381 is a cool color from the Magenta family, closest in name to “King’s Plum Pie”. In RGB it is rgb(181, 19, 129); in HSL, hsl(319, 81%, 39%).
The color King’s Plum Pie, with hexadecimal code #b51381, lands in the purple family, historically reserved for royalty due to the extreme cost of Tyrian dye. Purple activates imagination and spiritual contemplation, blending red's passion with blue's serenity. Additionally, it evokes emotions such as Compassion, Sincerity, Sophistication, Sweetness and Romance. Purple is often linked to creativity, luxury, and spirituality. In Western cultures, it is also associated with ambition and wealth. Indigo and violet have long signified royalty and nobility. With a high saturation of 81%, this color is intensely vivid—demanding attention and ideal for focal elements like buttons, banners, and brand marks. Its low lightness of 39% produces a deep, rich appearance—conveying gravity and luxury, particularly effective in dark-mode designs and premium packaging. This color is ideal for designs that aim to express Compassion, Sincerity, Sophistication, Sweetness, or Romance. It can be effectively used in web design, branding, and marketing materials to attract attention and convey specific messages.
Key facts
The story of this color
King’s Plum Pie (#B51381) belongs to the Magenta color family.
This vivid mid-tone strikes the ideal balance between intensity and readability, making it a strong candidate for primary brand colors, interactive UI elements, and logo design where immediate recognition is essential.
Magenta was named after the Battle of Magenta (1859) in Italy, coinciding with the discovery of the first aniline dye of that hue. This synthetic breakthrough launched the modern chemical-dye industry, making vibrant colors accessible to the masses. In the CMYK model, magenta is a primary ink—without it, printers cannot reproduce the warm half of the color spectrum.
Magenta commands attention and conveys boldness, making it ideal for fashion, entertainment, and disruptive tech brands (T-Mobile's signature magenta is a prime example). Pair it with charcoal or dark teal for grounding, or with lime for an electric, festival-style palette. Magenta headlines on white backgrounds create instant visual impact.
Sitting on the cool side of the spectrum (hue 319°), it promotes a feeling of calm distance and intellectual clarity, which is why cool hues dominate corporate identities, healthcare design, and productivity tools. At 81% saturation, this is a highly vivid color that demands attention. Use it where maximum visual impact is needed—feature banners, accent buttons, and data-visualization highlights.
Magenta blends red's energy with purple's creativity, producing a color that feels both passionate and unconventional. It signals confidence, non-conformity, and emotional expressiveness. In UX, magenta accent colors can highlight premium features or creative tools.
With a mid-range lightness of 39%, this tone is highly versatile: dark enough to serve as body text on white, yet light enough to stand out on charcoal or navy backgrounds.
Use magenta as a gradient endpoint (blue-to-magenta) for modern SaaS branding. Create neon-magenta-on-black compositions for nightlife and music event promotion. In e-commerce, magenta 'New' or 'Hot' badges draw the eye to featured products.
Every format
Every way to write King’s Plum Pie — one-tap copy on every format; tap on any card to learn what it is and when to use it.
#B51381
Hexadecimal is the web’s universal color notation — two digits each for red, green and blue. Drop it straight into HTML, CSS or any design tool.
rgb(181, 19, 129)
RGB is the additive Red-Green-Blue model every screen uses to emit light. The default choice for websites, apps and on-screen UI.
hsl(319, 81%, 39%)
HSL breaks a color into Hue, Saturation and Lightness — the most intuitive way to lighten, darken or mute a color in CSS.
hsv(319, 90%, 71%)
HSV (also called HSB) maps Hue, Saturation and Value/Brightness. It is the model behind the color pickers in Photoshop, Figma and most design apps.
hwb(319 7% 29%)
HWB blends a pure hue with Whiteness and Blackness — a painter-friendly model added in CSS Color 4 for quick tints and shades.
cmyk(0%, 90%, 29%, 29%)
CMYK is the subtractive Cyan-Magenta-Yellow-Black ink model. Use these values when preparing artwork for a printer or commercial press.
oklch(51.96% 0.210 346.32)
OKLCH is a modern, perceptually-uniform space (Lightness, Chroma, Hue). It powers smooth gradients and accessible palettes in today’s CSS.
oklab(51.96% 0.204 -0.050)
OKLab is the Cartesian form of OKLCH — ideal for blending and interpolating colors without the muddy midpoints older spaces produce.
L: 41.02, a: 66.95, b: -18.76
CIELAB is a device-independent, perceptually-uniform space. It is the standard for measuring color difference (ΔE) and matching across devices.
L: 41.02, C: 69.53, H: 344.34
LCH is CIELAB in cylindrical form — Lightness, Chroma and Hue — letting you adjust vividness and hue while staying perceptually even.
X: 23.25, Y: 11.87, Z: 21.84
CIE XYZ is the 1931 master space that underpins every other model here — the scientific bridge used to convert between color systems.
11867009
The 24-bit integer value of the color — handy for databases, APIs, game engines and low-level graphics code.
Channel breakdown
How much red, green and blue light mixes into King’s Plum Pie.
Percentages show each channel's share of the total light (R + G + B) in King’s Plum Pie.
Ink coverage
Ink needed to reproduce King’s Plum Pie in four-color print. Heaviest ink: Magenta.
Print tip: treat these values as a starting point — final output depends on printer profile, paper stock and calibration.
Accessibility · WCAG
How bright King’s Plum Pie is, and how far black and white text clear each WCAG bar.
Contrast ratio · 1:1 → 21:1 (log scale)
Developer shortcuts
Copy-and-paste CSS for King’s Plum Pie — per-line copy, or grab the whole block.
background-color: #B51381;
color: #B51381;
border: 2px solid #B51381;
background-color: rgb(181, 19, 129);
background-color: hsl(319, 81%, 39%);
--color: #B51381;
Shades · light to dark
Lighter and darker steps of King’s Plum Pie — the color's full brightness range in one strip.
The dot marks the original color. Hover any shade to copy its hex or open its color page.
Harmony · 180° apart
Two colors opposite on the wheel — maximum contrast for attention-grabbing accents.
The dot marks the original color. Hover any shade to copy its hex or open its color page.
Harmony · adjacent hues
Neighboring hues on the wheel — harmonious, calm combinations that feel unified.
The dot marks the original color. Hover any shade to copy its hex or open its color page.
Harmony · 120° apart
Three colors evenly spaced on the wheel — vibrant and energetic, yet balanced.
The dot marks the original color. Hover any shade to copy its hex or open its color page.
Harmony · 90° apart
Four colors evenly spaced on the wheel (tetradic) — rich schemes with multiple accents.
The dot marks the original color. Hover any shade to copy its hex or open its color page.
Accessibility
How King’s Plum Pie reads across five kinds of color vision — a ✓ Friendly verdict means the color difference stays distinguishable for that vision type.
The dot marks the original color. Hover any shade to copy its hex.
Harmony overview
The lead color from each harmony scheme, side by side — a shortcut to the full palettes above.
Perceptually nearby
A step away in brightness, richness or shade — each still feels like the same color.
From the color-name library
The closest named colors to #B51381 — same mood, each with its own character.
Looking for more Purple shades? Browse Purple colors →
Inspiration
Curated Unsplash photos that carry the mood of King’s Plum Pie — hover any tile to download it or view the original.
Good to know
Harmony