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Color Directory/Slate 500

Slate 500 (#64748B)

Luminance: 17% · Nearest standard name: Slate 500

Generate Around This Color
SLATE 500
#64748B
rgb(100, 116, 139) · hsl(215°, 16%, 47%)
HEX#64748B
RGB100, 116, 139
HSL215°, 16%, 47%
HSV / HSB215°, 28%, 55%
CMYK (Print)28%, 17%, 0%, 45%

Color Harmonies

Complementary

#64748B#8B7B65

Analogous

#65888B#64748B#68658B

Triadic

#64748B#8B6575#758B65

Tints & Shades

Lighter Tints
Darker Shades

WCAG 2.2 Contrast Verification

Against White (#FFFFFF)4.76:1

Sample text rendered with #64748B on white

AA Normal: PASSAA Large: PASS
Against Dark (#0F172A)3.75:1

Sample text rendered with #64748B on dark

AA Normal: FAILAA Large: PASS

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#F8FAFCCopy
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#2B0938Copy
#6A0572Copy
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#D85A52Copy
#F9A03FCopy
cp-featured-02Sunset
Malibu Dusk Glow
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#E76F51Copy
#F4A261Copy
#E9C46ACopy
#2A9D8FCopy
#264653Copy
cp-featured-03Vintage
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#050505Copy
#00FF66Copy
#00F0FFCopy
#FF0055Copy
#FFE600Copy
cp-featured-04Gaming
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Comprehensive Color Profile & Design Architecture

The Complete Color Guide to Slate 500 (#64748B)

Slate 500 (#64748B) is a distinct shade within the Blue chromatic spectrum. Characterized by an optical luminance of 17% 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#64748B
RGB Space100, 116, 139
HSL Values215°, 16%, 47%
HSV / HSB215°, 28%, 55%
CMYK Ink28%, 17%, 0%, 45%
TemperatureCool

Optical Color Harmony Formulas for Slate 500

Geometric intervals calculated from #64748B on the 360-degree color wheel.

Direct Polar (180°)#8B7B65

Complementary Harmony

Pairs Slate 500 with its polar opposite (#8B7B65) to create maximum optical contrast, perfect for high-converting call-to-action buttons.

Adjacent (±30°)#65888B · #68658B

Analogous Harmony

Positions adjacent neighboring hues on either side of Slate 500 for serene, gentle, and organic visual transitions.

Split Angles (150° / 210°)#8B6865 · #888B65

Split-Complementary

Uses the two colors flanking the direct complement of Slate 500, offering rich visual variety without harsh chromatic vibration.

Triangular (120°)#8B6575 · #758B65

Triadic Harmony

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

Rectangular (90°)#8B6588 · #8B7B65 · #658B68

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 Slate 500

Lock #64748B inside our interactive generator to calculate live matching palettes in real time.

Launch Palette Generator

The 60-30-10 UI Implementation Role for Slate 500

Recommended proportional volume and semantic interface assignment.

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

Because of its muted, low-chroma saturation (16%), Slate 500 (#64748B) 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 AdaptationDesaturate slightly for ambient glow
Tonal Expansion ScaleView 10-step design token ramp →

Color Psychology & Industry Alignment

Strategic cognitive triggers and target sector recommendations.

Cognitive & Emotional Perception

This color projects authority, intelligence, and calm dependability. Universally trusted across enterprise software and fintech products.

Optimal Industry Verticals

Fintech, Enterprise SaaS, Healthcare, Cloud Infrastructure. Combining Slate 500 with intentional neutral whitespace reinforces authority and conversion clarity.

Production Code Tokens for Slate 500

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

CSS Custom Properties (:root)Vanilla CSS
:root {
  --color-64748b: #64748B;
  --color-64748b-rgb: 100, 116, 139;
  --color-64748b-hsl: 215deg 16% 47%;
}
tailwind.config.jsTailwind CSS
module.exports = {
  theme: {
    extend: {
      colors: {
        '64748b': '#64748B',
      }
    }
  }
};

Explore Related Color Tools for Slate 500

Continue developing your color system with specialized design tools.

Palette Generator

Generate harmonious 5-color palettes anchored to Slate 500.

Launch Tool

WCAG Contrast Checker

Verify Level AA and AAA readability for Slate 500 against any background.

Check Contrast

Shades & Tints Scale

Generate a full 10-step tonal scale from 50 to 900 for Slate 500.

Expand Scale

CSS Gradient Generator

Create linear and radial gradients blending Slate 500 with complementary hues.

Build Gradients

Frequently Asked Questions About Slate 500 (#64748B)

Authoritative answers covering Slate 500 color codes, WCAG contrast compliance, and UI design systems.

What are the exact digital and print color codes for Slate 500 (#64748B)?
Slate 500 is defined by the HEX code #64748B. Its digital screen RGB coordinates are R:100, G:116, B:139. Its cylindrical HSL values are Hue:215°, Saturation:16%, Lightness:47%. In HSV/HSB format, it is 215°, 28%, 55%. For four-color CMYK process printing, its ink percentages are C:28%, M:17%, Y:0%, K:45%.
Does Slate 500 (#64748B) pass WCAG 2.2 accessibility standards for text readability?
Against a pure white (#FFFFFF) background, Slate 500 achieves a contrast ratio of 4.76:1 (Passing WCAG AA for normal body text, and Passing for large headings). Against dark slate (#0F172A), it achieves a contrast ratio of 3.75:1 (Failing WCAG AA).
What is the direct complementary color for Slate 500 (#64748B)?
The exact 180-degree optical complementary color for #64748B is #8B7B65. When placed side-by-side, #64748B and #8B7B65 create maximum visual tension and high click-through conversion rates.
What is the recommended role for Slate 500 in the 60-30-10 UI design rule?
Because of its muted, low-chroma saturation (16%), Slate 500 (#64748B) excels as a secondary surface color for container cards, table borders, navigation sidebars, and divider strokes.
How can I copy and export Slate 500 into Tailwind CSS and CSS variables?
You can define Slate 500 in CSS custom properties as ':root { --color-custom: #64748B; }' or paste it into your 'tailwind.config.js' file under 'theme.extend.colors'. You can also generate full palettes containing Slate 500 using our interactive Color Palette Generator.
Which color family does Slate 500 (#64748B) belong to?
Slate 500 belongs to the Blue family (Cool spectrum). You can explore full tonal ramps and curated palettes in our Blue Color Guide.