Strong Blue (Teal)

A deeply saturated dark blue-green, powerful like deep ocean currents

HEX#006374

RGBrgb(0, 99, 116)

HSLhsl(189, 100%, 23%)

HSVhsv(189, 100%, 45%)

CMYKcmyk(100%, 15%, 0%, 55%)

HEXA#006374FF

RGBArgba(0, 99, 116, 1)

HSLAhsla(189, 100%, 23%, 1)

OKLCHoklch(66.5%, 0.113, 204)

LCHlch(62.5%, 42, 210)

🎨 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

#FFFFFFRatio 6.9:1AA

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

Aa14px Body

Standard Text

#B8D1FFRatio 4.5:1AA

Suitable for regular body content, meeting WCAG AA standards

Aa14px Body

Large Text / UI Components

#AD9EFFRatio 3:1AA Large

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

Aa14px Body

Decorative / Dividers

#FA00D4Ratio 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%

#001E24

#002B33

#00343D

#00414D

#004E5C

#005766

#006475

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

#234B52

#1D4F58

#17535E

#125764

#0C5B6A

#06606F

#006475

Lightness + Saturation Mixed VariationSimultaneous lightness and saturation proportional scaling

#0C1617

#0F2124

#0E2A2F

#0D383F

#0B4751

#065260

#006475

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

#00756A

#007573

#006D75

#006475

#005A75

#005075

#004675

💡 Use Cases

🤿

Diving Equipment

Long freediving fins and low-volume masks, embodying the professionalism and solitary courage of deep-sea explorers.

🏋️

Strength Equipment

Powder coating on gym rigs and heavy bumper plates, visually carrying the weight of iron.

🚢

Industrial Valves

High-pressure pipes on ships or chemical plants—using this warning color for quick identification in complex systems.

🎮

Cthulhu Style

Game concept art for tentacles or deep-sea creatures, creating the eerie, unknown atmosphere of underwater temples.

📜 Origin & History

Strong Blue sits intensely between deep blue and dark green. 19th-century watercolorists captured the English Channel before storms with this high-tension blue-green, foretelling hidden currents beneath calm surfaces.

In Victorian decorative arts, strong blue depicted sea monster scales and mysterious mermaids. This oppressive, untamable hue served as a substitute for the exotic and romantic in rigid British society.

In the mid-20th century, strong blue entered industrial safety as the warning color for heavy machinery and pressure vessels—its low brightness and high saturation warning workers of weight and fluid-related extreme risks.

In recent years, strong blue's depth and vitality have made it popular for high-performance sports gear and liquid-metal aesthetics. It represents controlled dominance—both aquatic and metallic in toughness.

🧠 Color Psychology

SuffocatingThe pressure of deep diving—dangerous yet accompanied by extreme focus and clarity.

TenseFull, ready energy, like a drawn bow, containing physical inertia and impact about to be released.

ControllingMastery over complex situations—absolute will under chaotic currents, rejecting all loss of control.

UndercurrentHidden flow beneath a calm surface, giving personality a complex of outer calm and inner passion frozen beneath ice.

ProfoundExtreme emotional depth, like the heart of the ocean, suffocated by endless water, unable to surface.

VintageHeavily marked by early industrialization—cast iron machines, steam valves, the weight of an era.

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