Ocean Blue (RAL 5020)

RAL ocean blue, a dark blue-green like deep sea water

HEX#0B4151

RGBrgb(11, 65, 81)

HSLhsl(194, 76%, 18%)

HSVhsv(194, 86%, 32%)

CMYKcmyk(86%, 20%, 0%, 68%)

HEXA#0B4151FF

RGBArgba(11, 65, 81, 1)

HSLAhsla(194, 76%, 18%, 1)

OKLCHoklch(59.1%, 0.08, 212)

LCHlch(53.4%, 30.8, 218)

🎨 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

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Aa14px Body

High Contrast Text

#8AD8EFRatio 7:1AAA

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

Aa14px Body

Standard Text

#86A2EERatio 4.5:1AA

Suitable for regular body content, meeting WCAG AA standards

Aa14px Body

Large Text / UI Components

#8C6FEBRatio 3:1AA Large

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

Aa14px Body

Decorative / Dividers

#BC1A97Ratio 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%

#031216

#04191F

#06242D

#072B36

#09323F

#0A3948

#0B4151

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

#20353C

#1C373F

#193943

#163B46

#123D4A

#0F3F4D

#0B4151

Lightness + Saturation Mixed VariationSimultaneous lightness and saturation proportional scaling

#0A0E10

#0C1518

#0F1F24

#10272E

#0F2F38

#0D3744

#0B4151

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

#0B5150

#0B4C51

#0B4651

#0B4151

#0B3B51

#0B3551

#0B2F51

💡 Use Cases

🛳️

Shipwreck Imagery

Immersive exhibition background for the Titanic—using ocean blue to recreate the dark, lonely bow at the Atlantic bottom.

🎸

Post-Punk Aesthetics

Vinyl reissues of The Cure and Joy Division—ocean blue resurrecting Manchester's 1980s gloom.

⌚

Deep-Sea Watches

Omega Seamaster Ultra Deep's gradient dial—simulating the color collapse outside the porthole during a descent from shallows to abyss.

🦑

Deep-Sea Games

Interface atmosphere for Subnautica and similar marine survival horror games—deep ocean blue providing the backdrop of fear and primal survival instinct.

📜 Origin & History

RAL 5020 Ocean Blue freezes the color of the aphotic zone where sunlight cannot penetrate. In the 19th century, oceanographers on the Challenger expedition first measured deep-sea color characteristics—the ink-green blue-black they sampled represented endless water pressure and unknown life forms.

During the Cold War, Soviet and American divers' deep-sea diving bells and helmet interiors were often painted this ocean blue. In the sunless seabed, the faint headlamp reflecting off ocean-blue surfaces helped divers maintain spatial orientation.

In Gothic literature and post-punk music, ocean blue is the color of shipwrecks, old ports, and pagan rituals. Joy Division's Unknown Pleasures album design contained layer upon layer of this trench-like deep blue, becoming post-punk's cold visual myth.

With deep-sea exploration's resurgence, James Cameron's and Jiaolong's submersibles inspired the watch industry. Rolex Deepsea and Omega Ultra Deep lines introduced ocean-blue gradient dials, homage to the conquered Mariana Trench.

🧠 Color Psychology

AbyssalIn this lightless water layer, time loses biological meaning—existence itself is boundless, silent eternity.

PressuredBearing weight like deep-sea pressure—every meter of descent a brutal test of physical and mental limits.

PrehistoricVeiling forgotten prehistoric beasts and palace ruins in the ocean—ancient genetic specimens frozen in color.

Solo VoyageLike a ghost ship adrift—cut off from all contact in the infinite deep blue, sinking into complete self-exile.

EerieCarrying Lovecraftian unease—as if unnameable deep-sea tentacles might emerge at any moment.

WashedAntiques salvaged from shipwrecks—colors bearing the traces of salt, rust, and time, washed clean of all pretense.

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