Deep Sky Blue

The profound sky blue of a clear midday, full-bodied and luminous

HEX#00BFFF

RGBrgb(0, 191, 255)

HSLhsl(195, 100%, 50%)

HSVhsv(195, 100%, 100%)

CMYKcmyk(100%, 25%, 0%, 0%)

HEXA#00BFFFFF

RGBArgba(0, 191, 255, 1)

HSLAhsla(195, 100%, 50%, 1)

OKLCHoklch(83.4%, 0.145, 212)

LCHlch(82.3%, 52.7, 219)

🎨 Color Palettes

Analogous2-3 adjacent hues (≤60°)

Triadic3 hues spaced 120° apart

Split ComplementaryMain color + colors adjacent to its complement

Complementary2 hues spaced 180° apart

Tetradic (Rectangle)4 hues forming a rectangle

MonochromaticSingle hue with varying saturation and lightness

♿ WCAG Contrast Colors

Learn More →

Aa14px Body

High Contrast Text

#FAFEFFRatio 2.1:1Fail

Suitable for body text, headings, and primary content, ensuring readability for all users

Aa14px Body

Standard Text

#0040FFRatio 3.1:1AA Large

Suitable for regular body content, meeting WCAG AA standards

Aa14px Body

Large Text / UI Components

#4000FFRatio 3.7:1AA Large

Suitable for large text (≥18px bold or ≥24px), icons, UI component boundaries

Aa14px Body

Decorative / Dividers

#FFF5FCRatio 2:1Fail

Suitable for decorative elements, dividers, non-essential text

📊 Color Scales

Online Color Picker → Gradient Generator →

Lightness VariationFixed hue and saturation, proportional lightness scaling 30%→100%

#00394D

#00506B

#00678A

#007AA3

#0091C2

#00A8E0

#00BFFF

Saturation VariationFixed hue and lightness, proportional saturation scaling 40%→100%

#4D99B3

#409FBF

#33A6CC

#26ACD9

#19B3E6

#0DB9F2

#00BFFF

Lightness + Saturation Mixed VariationSimultaneous lightness and saturation proportional scaling

#1B2C32

#1F414C

#205769

#1D6C87

#1686AC

#0DA2D3

#00BFFF

Hue Fine-TuningFixed saturation and lightness, stepwise hue fine-tuning ±15°

#00FFFF

#00EAFF

#00D4FF

#00BFFF

#00AAFF

#0095FF

#007FFF

💡 Use Cases

🪂

Skydiving

Paraglider and parachute colors that paint stunning bright trails against the blue sky.

📡

Weather Apps

Default background for sunny forecasts, using this specific blue to declare a rain-free outdoor window.

🎢

Water Parks

Ground surfacing for long water slides, offering the ultimate cool sensation of plunging into blue sky on a hot summer day.

🧴

Men's Fragrance

Bottle glass refraction for sporty colognes, conveying fresh, direct, sun-filled清爽 masculinity.

📜 Origin & History

Deep Sky Blue is a direct spectral sample of the noon sky. When the sun is at zenith, Rayleigh scattering of short-wave blue is at its maximum—this high-saturation blue was quantitatively defined in the 19th century by physicists.

Impressionists like Monet and Pissarro avoided pure white, instead using deep sky blue for sunny shadows and light-dark transitions, because their eyes told them shadows were blue, not dead grey.

Catalogued as DeepSkyBlue in 1990s web-safe colors, this explosive blue appeared sharply on LCDs, often used for game buttons needing instant attention.

With drones and aerial photography today, deep sky blue has become the romantic hue of viewing Earth from the stratospheric edge—a color that represents humanity's infinite longing for the sky.

🧠 Color Psychology

ElevatedLifting the visual plane to great heights, releasing intensely positive excitement.

TransparentPure, clean airiness, washing the lungs like alpine altitude—giving clarity of insight.

OptimisticA conditioned reflex of fine weather, directly eliminating depression like dopamine, summoning childlike playfulness.

PanoramicA bird's-eye view granting global perspective, making trivial troubles negligible at the horizon.

FrankUnreserved sincerity, like facing the noon sun—all communication ought to be honest with no dark corners.

AspirationalPainting the future with the brightest hue, pushing one to leave the comfort zone and reach for the sky.

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