Grey Aluminium (RAL)

RAL metallic grey aluminium, a warm grey tone like oxidized aluminium

Gray TonesSteadyDigital Standard
HEX#878581
RGBrgb(135, 133, 129)
HSLhsl(40, 2%, 52%)
HSVhsv(40, 4%, 53%)
CMYKcmyk(0%, 1%, 4%, 47%)
HEXA#878581FF
RGBArgba(135, 133, 129, 1)
HSLAhsla(40, 2%, 52%, 1)
OKLCHoklch(80.5%, 0.004, 85)
LCHlch(77.4%, 7.5, 205)

🎨 Color Palettes

Analogous2-3 adjacent hues (≤60°)
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#878382
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#878581
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#868782
Triadic3 hues spaced 120° apart
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#878581
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#828785
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#858287
Split ComplementaryMain color + colors adjacent to its complement
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#878581
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#828687
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#838287
Complementary2 hues spaced 180° apart
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#878581
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#828487
Tetradic (Rectangle)4 hues forming a rectangle
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#878581
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#828783
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#828487
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#878286
MonochromaticSingle hue with varying saturation and lightness
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#1F1F1E
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#535250
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#878581
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#B9B8B6
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#EBEBEA

♿ WCAG Contrast Colors

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Aa14px Body
High Contrast Text
#FFFFFFRatio 3.7:1AA Large
Suitable for body text, headings, and primary content, ensuring readability for all users
Aa14px Body
Standard Text
#FFFFFFRatio 3.7:1AA Large
Suitable for regular body content, meeting WCAG AA standards
Aa14px Body
Large Text / UI Components
#E8E9E8Ratio 3:1AA Large
Suitable for large text (≥18px bold or ≥24px), icons, UI component boundaries
Aa14px Body
Decorative / Dividers
#BBBEBDRatio 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%
#2A2928Copy
#393837Copy
#494846Copy
#585755Copy
#686764Copy
#787673Copy
#878582Copy
Saturation VariationFixed hue and lightness, proportional saturation scaling 40%→100%
#868583Copy
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Lightness + Saturation Mixed VariationSimultaneous lightness and saturation proportional scaling
#292928Copy
#393838Copy
#484847Copy
#585756Copy
#686764Copy
#787673Copy
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Hue Fine-TuningFixed saturation and lightness, stepwise hue fine-tuning ±15°
#878482Copy
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💡 Use Cases

🔧

Precision Machinery

Housing coating for optical instruments and precision machine tools, the standard for industrial texture in professional equipment.

🎛️

Professional Audio

Panel color for studio monitor speakers and mixing consoles, a professional background color that doesn't distract the ear.

🛠️

Hand Tools

Surface finish for high-end wrenches and measuring tools, a craftsman's gear balancing practicality and texture.

🏭

Industrial Style Home Decor

Aged finish for metal lamps and furniture in loft spaces, creating a raw, authentic industrial atmosphere.

📜 Origin & History

RAL 9007 Grey Aluminium is a deeper aluminum gray color code in the RAL metallic series than 9006. Its color simulates the matte warm gray effect of aluminum alloy after sandblasting or anodizing surface treatment.

In the field of precision machining, Grey Aluminium is a common appearance color for aluminum alloy parts after surface treatment, widely used in the housing manufacturing of optical instruments and precision machine tools.

In 20th-century military equipment, Grey Aluminium was used as a standard paint color for military devices and weapons due to its low reflection and corrosion resistance, serving both concealment and practical purposes.

The high-end audio and Hi-Fi equipment industry has long favored Grey Aluminium for front panels. This low-reflection neutral gray does not interfere with the listening experience while conveying a sense of the product's substantial metallic quality.

In recent years, with the popularity of industrial retro interior design, Grey Aluminium has become an important color choice for metal lamps, furniture, and decorative pieces, representing an aesthetic attitude of rugged, authentic industrialism.

🧠 Color Psychology

Sturdy and DurableThe color of surface-hardened aluminum suggests military-grade durability and robustness.
Low-key ProfessionalismThe non-reflective matte grey aluminum surface represents a professional attitude that does not pursue superficial glamour but focuses on the essence.
Industrial HonestyAn honest aesthetic that preserves the real texture of metal processing traces, without concealment or pretense.
Solid TextureA heavier metallic color than light silver-gray, providing a reliable, steady sense of weight and presence.
PragmatismA color choice originating from functional needs; anti-corrosion and wear resistance take precedence over decorative effect.
Rugged RetroThe metallic color of old industrial equipment evokes nostalgia for the machine age and a tough, masculine image.
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