Conversions, palettes, contrast & design ideas for this color.
Color profile
#664E5E is a warm color from the Pink family, closest in name to “Hibernation”. In RGB it is rgb(102, 78, 94); in HSL, hsl(320, 13%, 35%).
The color Hibernation, with hexadecimal code #664e5e, 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 Compassion, Sincerity, Sophistication, Sweetness and Romance. 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. At just 13% saturation, this near-neutral shade carries only a subtle hint of its underlying hue, making it versatile for large surfaces and professional contexts. Its low lightness of 35% 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
Hibernation (#664E5E) belongs to the Pink color family.
With a dusty, low-saturation character, this color offers quiet complexity—neither bold nor faded. Dusty tones add vintage charm to retro-inspired designs and pair beautifully with metallic accents like copper or brass.
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 320°), it naturally draws the eye and creates a sense of closeness—making it effective for calls to action, food photography, and hospitality branding. With only 13% saturation, this near-neutral shade carries just a hint of its underlying hue—subtle enough for large surfaces yet adding more warmth (or coolness) than a pure gray.
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.
With a mid-range lightness of 35%, 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 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 Hibernation — one-tap copy on every format; tap on any card to learn what it is and when to use it.
#664E5E
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(102, 78, 94)
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(320, 13%, 35%)
HSL breaks a color into Hue, Saturation and Lightness — the most intuitive way to lighten, darken or mute a color in CSS.
hsv(320, 24%, 40%)
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(320 31% 60%)
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%, 24%, 8%, 60%)
CMYK is the subtractive Cyan-Magenta-Yellow-Black ink model. Use these values when preparing artwork for a printer or commercial press.
oklch(45.45% 0.040 338.96)
OKLCH is a modern, perceptually-uniform space (Lightness, Chroma, Hue). It powers smooth gradients and accessible palettes in today’s CSS.
oklab(45.45% 0.038 -0.014)
OKLab is the Cartesian form of OKLCH — ideal for blending and interpolating colors without the muddy midpoints older spaces produce.
L: 36.14, a: 13.05, b: -5.47
CIELAB is a device-independent, perceptually-uniform space. It is the standard for measuring color difference (ΔE) and matching across devices.
L: 36.14, C: 14.15, H: 337.27
LCH is CIELAB in cylindrical form — Lightness, Chroma and Hue — letting you adjust vividness and hue while staying perceptually even.
X: 10.22, Y: 9.08, Z: 11.80
CIE XYZ is the 1931 master space that underpins every other model here — the scientific bridge used to convert between color systems.
6704734
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 Hibernation.
Percentages show each channel's share of the total light (R + G + B) in Hibernation.
Ink coverage
Ink needed to reproduce Hibernation 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 Hibernation 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 Hibernation — per-line copy, or grab the whole block.
background-color: #664E5E;
color: #664E5E;
border: 2px solid #664E5E;
background-color: rgb(102, 78, 94);
background-color: hsl(320, 13%, 35%);
--color: #664E5E;
Shades · light to dark
Lighter and darker steps of Hibernation — 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 Hibernation 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 #664E5E — same mood, each with its own character.
Looking for more Pink shades? Browse Pink colors →
Inspiration
Curated Unsplash photos that carry the mood of Hibernation — hover any tile to download it or view the original.
Good to know
Harmony