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Color Directory/Thundercloud

Thundercloud (#3B3D4F)

Luminance: 5% · Nearest standard name: Thundercloud

Generate Around This Color
THUNDERCLOUD
#3B3D4F
rgb(59, 61, 79) · hsl(234°, 14%, 27%)
HEX#3B3D4F
RGB59, 61, 79
HSL234°, 14%, 27%
HSV / HSB234°, 25%, 31%
CMYK (Print)25%, 23%, 0%, 69%

Color Harmonies

Complementary

#3B3D4F#4E4D3B

Analogous

#3B474E#3B3D4F#433B4E

Triadic

#3B3D4F#4E3B3D#3D4E3B

Tints & Shades

Lighter Tints
Darker Shades

WCAG 2.2 Contrast Verification

Against White (#FFFFFF)10.68:1

Sample text rendered with #3B3D4F on white

AA Normal: PASSAA Large: PASS
Against Dark (#0F172A)1.67:1

Sample text rendered with #3B3D4F on dark

AA Normal: FAILAA Large: FAIL

Palettes Featuring Similar Tones

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#F8FAFCCopy
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#E76F51Copy
#F4A261Copy
#E9C46ACopy
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cp-featured-03Vintage
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#050505Copy
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cp-featured-04Gaming
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Comprehensive Color Profile & Design Architecture

The Complete Color Guide to Thundercloud (#3B3D4F)

Thundercloud (#3B3D4F) is a distinct shade within the Blue chromatic spectrum. Characterized by an optical luminance of 5% and a cool color temperature, this tone plays a vital role across web applications, brand identities, and editorial typography. Discover its mathematical harmonies, accessibility metrics, UI engineering roles, and front-end code tokens.

Technical Colorimetry & Coordinate Breakdown

Exact mathematical values across digital display, print press, and human perceptual spaces.

HEX Code#3B3D4F
RGB Space59, 61, 79
HSL Values234°, 14%, 27%
HSV / HSB234°, 25%, 31%
CMYK Ink25%, 23%, 0%, 69%
TemperatureCool

Optical Color Harmony Formulas for Thundercloud

Geometric intervals calculated from #3B3D4F on the 360-degree color wheel.

Direct Polar (180°)#4E4D3B

Complementary Harmony

Pairs Thundercloud with its polar opposite (#4E4D3B) to create maximum optical contrast, perfect for high-converting call-to-action buttons.

Adjacent (±30°)#3B474E · #433B4E

Analogous Harmony

Positions adjacent neighboring hues on either side of Thundercloud for serene, gentle, and organic visual transitions.

Split Angles (150° / 210°)#4E433B · #474E3B

Split-Complementary

Uses the two colors flanking the direct complement of Thundercloud, offering rich visual variety without harsh chromatic vibration.

Triangular (120°)#4E3B3D · #3D4E3B

Triadic Harmony

Forms an equilateral triangle on the color wheel, generating playful, dynamic energy when balanced against a neutral background.

Rectangular (90°)#4E3B47 · #4E4D3B · #3B4E43

Tetradic (Square) Harmony

A rich four-color scheme combining two complementary pairs, ideal for complex dashboards, gaming HUDs, and multi-tier charts.

Interactive Exploration

Build Palettes With Thundercloud

Lock #3B3D4F inside our interactive generator to calculate live matching palettes in real time.

Launch Palette Generator

The 60-30-10 UI Implementation Role for Thundercloud

Recommended proportional volume and semantic interface assignment.

Recommended Assignment: Structural Surface & Border Tone (30% Volume)

Because of its muted, low-chroma saturation (14%), Thundercloud (#3B3D4F) excels as a secondary surface color for container cards, table borders, navigation sidebars, and divider strokes.

Light Mode SurfaceIdeal for buttons and badges
Dark Mode AdaptationOptimal dark canvas backdrop
Tonal Expansion ScaleView 10-step design token ramp →

Color Psychology & Industry Alignment

Strategic cognitive triggers and target sector recommendations.

Cognitive & Emotional Perception

Provides timeless neutrality, structural balance, and minimalist sophistication. Eliminates chromatic noise so primary content and photography take center stage.

Optimal Industry Verticals

Editorial Publications, Minimalist Portfolios, Architecture, Hardware Engineering. Combining Thundercloud with intentional neutral whitespace reinforces authority and conversion clarity.

Production Code Tokens for Thundercloud

Drop-in design system tokens for CSS, Tailwind CSS, and SCSS.

CSS Custom Properties (:root)Vanilla CSS
:root {
  --color-3b3d4f: #3B3D4F;
  --color-3b3d4f-rgb: 59, 61, 79;
  --color-3b3d4f-hsl: 234deg 14% 27%;
}
tailwind.config.jsTailwind CSS
module.exports = {
  theme: {
    extend: {
      colors: {
        '3b3d4f': '#3B3D4F',
      }
    }
  }
};

Explore Related Color Tools for Thundercloud

Continue developing your color system with specialized design tools.

Palette Generator

Generate harmonious 5-color palettes anchored to Thundercloud.

Launch Tool

WCAG Contrast Checker

Verify Level AA and AAA readability for Thundercloud against any background.

Check Contrast

Shades & Tints Scale

Generate a full 10-step tonal scale from 50 to 900 for Thundercloud.

Expand Scale

CSS Gradient Generator

Create linear and radial gradients blending Thundercloud with complementary hues.

Build Gradients

Frequently Asked Questions About Thundercloud (#3B3D4F)

Authoritative answers covering Thundercloud color codes, WCAG contrast compliance, and UI design systems.

What are the exact digital and print color codes for Thundercloud (#3B3D4F)?
Thundercloud is defined by the HEX code #3B3D4F. Its digital screen RGB coordinates are R:59, G:61, B:79. Its cylindrical HSL values are Hue:234°, Saturation:14%, Lightness:27%. In HSV/HSB format, it is 234°, 25%, 31%. For four-color CMYK process printing, its ink percentages are C:25%, M:23%, Y:0%, K:69%.
Does Thundercloud (#3B3D4F) pass WCAG 2.2 accessibility standards for text readability?
Against a pure white (#FFFFFF) background, Thundercloud achieves a contrast ratio of 10.68:1 (Passing WCAG AA for normal body text, and Passing for large headings). Against dark slate (#0F172A), it achieves a contrast ratio of 1.67:1 (Failing WCAG AA).
What is the direct complementary color for Thundercloud (#3B3D4F)?
The exact 180-degree optical complementary color for #3B3D4F is #4E4D3B. When placed side-by-side, #3B3D4F and #4E4D3B create maximum visual tension and high click-through conversion rates.
What is the recommended role for Thundercloud in the 60-30-10 UI design rule?
Because of its muted, low-chroma saturation (14%), Thundercloud (#3B3D4F) excels as a secondary surface color for container cards, table borders, navigation sidebars, and divider strokes.
How can I copy and export Thundercloud into Tailwind CSS and CSS variables?
You can define Thundercloud in CSS custom properties as ':root { --color-custom: #3B3D4F; }' or paste it into your 'tailwind.config.js' file under 'theme.extend.colors'. You can also generate full palettes containing Thundercloud using our interactive Color Palette Generator.
Which color family does Thundercloud (#3B3D4F) belong to?
Thundercloud belongs to the Blue family (Cool spectrum). You can explore full tonal ramps and curated palettes in our Blue Color Guide.