Green Blue (RAL 5001)

RAL-standard green blue, a deep blue with greenish-cyan undertones

HEX#1F4764

RGBrgb(31, 71, 100)

HSLhsl(205, 53%, 26%)

HSVhsv(205, 69%, 39%)

CMYKcmyk(69%, 29%, 0%, 61%)

HEXA#1F4764FF

RGBArgba(31, 71, 100, 1)

HSLAhsla(205, 53%, 26%, 1)

OKLCHoklch(62.9%, 0.062, 232)

LCHlch(57.4%, 26.1, 237)

🎨 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

#C4DCEDRatio 6.9:1AA

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

Aa14px Body

Standard Text

#A5AAE3Ratio 4.4:1AA Large

Suitable for regular body content, meeting WCAG AA standards

Aa14px Body

Large Text / UI Components

#A37ED7Ratio 3:1AA Large

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

Aa14px Body

Decorative / Dividers

#BF3B88Ratio 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%

#0A161F

#0D1F2B

#112737

#142F42

#18384E

#1C405A

#1F4865

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

#344550

#304554

#2D4658

#2A465B

#26475E

#224862

#1F4865

Lightness + Saturation Mixed VariationSimultaneous lightness and saturation proportional scaling

#111518

#161D22

#1A252E

#1D2E3A

#1E3648

#1F3F56

#1F4865

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

#1F5A65

#1F5465

#1F4E65

#1F4865

#1F4265

#1F3C65

#1F3765

💡 Use Cases

🚢

Hull Coatings

Above-waterline coating for Baltic ferries and research vessels, resistant to seawater corrosion and blending with grey-blue sea and sky.

🏔️

Mountaineering Gear

Dark accent colors for professional alpine tents and shell jackets, providing optimal concealment at the snowline-rock transition zone.

🌲

Timber Architecture

Metal roofing and exterior wall finishes for Nordic forest cabins, allowing modern architecture to humbly recede against the surrounding spruce forests.

💧

Water Infrastructure

Designated color for control rooms of German waterworks and sewage treatment plants, visually communicating the responsibility of water resource management.

📜 Origin & History

RAL 5001 Green Blue serves as the foundational industrial standard in the blue-green spectrum. Its color inspiration stems partly from the deep fjords of Northern Europe and the reflections of coniferous forests on water. Scandinavian shipbuilding first applied this deep blue-green to the hulls of fishing vessels and ferries.

In the 1960s, the German Federal Railway adopted green blue as a secondary identification color for certain diesel locomotives and signal equipment. This intermediate hue offered natural low-visibility advantages against the forest and field backgrounds along railway lines.

With the rise of environmental awareness, green blue—evoking both the depth of water and the density of forests—was selected by German water and environmental monitoring agencies as their equipment color. It suggests that professional technology and natural ecology can achieve a precise, restrained balance.

Today, RAL 5001 is a popular choice for high-end outdoor gear and architectural facades. More enduring than pure blue and more composed than pure green, it is especially suited for industrial products and architectural details that need to blend discreetly into nature while maintaining a sense of quality.

🧠 Color Psychology

Deeply HiddenLike a secluded pool in a dense forest, refusing to be easily read—all emotions and calculations潜伏 beneath the heavy shadows.

TidalCarrying the rhythmic regularity of ocean movement—under a calm surface lies precise, ceaseless energy metabolism.

SurveyingAligned with the professional ethos of geological exploration and hydrographic surveying—measuring the world with objective data, rejecting romanticized misjudgment.

ToughnessLike shipbuilding steel that withstands salt spray and storms, maintaining structural integrity in extreme environments.

TemperateThe characteristic color of Northern Europe's temperate maritime climate—cool but not harsh, representing a life philosophy where minimalism and functionalism coexist.

SedimentedDeep, clear water after all suspended matter has settled—representing the experience and unshakeable confidence left behind after restlessness subsides.

← Back to Explore Colors