Conversions, palettes, contrast & design ideas for this color.
Color profile
#3F2230 is a warm color from the Pink family, closest in name to “Castro”. In RGB it is rgb(63, 34, 48); in HSL, hsl(331, 30%, 19%).
The color Castro, with hexadecimal code #3f2230, is part of the pink color family, a hue that spans from playful and youthful to elegant and gender-neutral. Pink evokes warmth, tenderness, and emotional connection across diverse cultural contexts. Additionally, it evokes emotions such as Love, Affection, Kindness and Playfulness. Pink is often connected to love, compassion, and femininity in Western cultures, while in Japan, it can symbolize spring and cherry blossoms. It can also represent universal harmony and emotional balance. With a moderate saturation of 30%, it has a softened, muted quality that lends sophistication and works well for backgrounds and secondary elements. At only 19% lightness, this extremely dark shade approaches black, delivering maximum drama and contrast when paired with lighter elements. This color is ideal for designs that aim to express Love, Affection, Kindness, or Playfulness. 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
Castro (#3F2230) belongs to the Pink color family.
This deep, saturated shade conveys authority and richness. Deep tones are favored in luxury packaging, evening-event branding, and dark-mode interfaces where they provide dramatic contrast against lighter elements.
Pink was considered a variant of red—and thus a strong, masculine color—until the mid-20th century, when Western marketing shifted it toward femininity. In 18th-century Rococo France, Madame de Pompadour popularized a specific shade (Rose Pompadour) that became synonymous with refined luxury. In Japan, pink cherry blossoms (sakura) represent the fleeting beauty of life, celebrated annually during hanami festivals.
Pink ranges from playful and youthful to sophisticated and gender-neutral depending on saturation and context. Hot pink works for bold fashion and beauty brands, while dusty pink suits elegant interior design and wedding stationery. Pair pink with navy for a classic contrast, or with sage green for a modern, botanical palette.
Positioned on the warm side of the color wheel (hue 331°), it naturally draws the eye and creates a sense of closeness—making it effective for calls to action, food photography, and hospitality branding. At 30% saturation, the color has a muted, sophisticated quality that pairs well with bolder accents. It works as a background, a border, or a secondary element in layered compositions.
Pink universally evokes warmth, tenderness, and approachability. Research by Alexander Schauss found that a specific shade ('Baker-Miller Pink') could reduce aggression, leading to its experimental use in holding cells. In branding, pink signals compassion, playfulness, and emotional connection.
Its low lightness of 19% gives it a deep, intense presence. Deep tones like this excel as dark-mode backgrounds, header bars, and anywhere a sense of gravity or luxury is desired.
Use blush pink as a background for portrait photography to create a warm, flattering glow. Combine hot pink with black for a punk-inspired editorial aesthetic. In app design, pink accent colors (hearts, favorites, notifications) feel natural and engaging.
Every format
Every way to write Castro — one-tap copy on every format; tap on any card to learn what it is and when to use it.
#3F2230
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(63, 34, 48)
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(331, 30%, 19%)
HSL breaks a color into Hue, Saturation and Lightness — the most intuitive way to lighten, darken or mute a color in CSS.
hsv(331, 46%, 25%)
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(331 13% 75%)
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%, 46%, 24%, 75%)
CMYK is the subtractive Cyan-Magenta-Yellow-Black ink model. Use these values when preparing artwork for a printer or commercial press.
oklch(29.54% 0.049 350.16)
OKLCH is a modern, perceptually-uniform space (Lightness, Chroma, Hue). It powers smooth gradients and accessible palettes in today’s CSS.
oklab(29.54% 0.048 -0.008)
OKLab is the Cartesian form of OKLCH — ideal for blending and interpolating colors without the muddy midpoints older spaces produce.
L: 17.53, a: 16.19, b: -3.24
CIELAB is a device-independent, perceptually-uniform space. It is the standard for measuring color difference (ΔE) and matching across devices.
L: 17.53, C: 16.51, H: 348.68
LCH is CIELAB in cylindrical form — Lightness, Chroma and Hue — letting you adjust vividness and hue while staying perceptually even.
X: 3.16, Y: 2.41, Z: 3.10
CIE XYZ is the 1931 master space that underpins every other model here — the scientific bridge used to convert between color systems.
4137520
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 Castro.
Percentages show each channel's share of the total light (R + G + B) in Castro.
Ink coverage
Ink needed to reproduce Castro in four-color print. Heaviest ink: Key (Black).
Print tip: treat these values as a starting point — final output depends on printer profile, paper stock and calibration.
Accessibility · WCAG
How bright Castro 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 Castro — per-line copy, or grab the whole block.
background-color: #3F2230;
color: #3F2230;
border: 2px solid #3F2230;
background-color: rgb(63, 34, 48);
background-color: hsl(331, 30%, 19%);
--color: #3F2230;
Shades · light to dark
Lighter and darker steps of Castro — 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 Castro 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 #3F2230 — same mood, each with its own character.
Looking for more Pink shades? Browse Pink colors →
Inspiration
Curated Unsplash photos that carry the mood of Castro — hover any tile to download it or view the original.
Good to know
Harmony