Is Sumi Ink Black (#1C1C1C) accessible for digital body text?

Against a pure white background (#FFFFFF), #1C1C1C achieves a contrast ratio of 17.04:1 (Passing WCAG AA normal text). Against a dark slate background (#0F172A), it achieves a contrast ratio of 1.05:1 (Failing WCAG AA normal text).

Which color harmonies pair best with Sumi Ink Black?

The exact complementary color for #1C1C1C is #1C1C1C. For analogous pairings, use #1C1C1C and #1C1C1C. You can explore these combinations further in our Color Harmony Generator.

Color Directory/Sumi Ink Black

Sumi Ink Black (#1C1C1C)

Q: What are the exact digital and print color codes for Sumi Ink Black (#1C1C1C)?

Sumi Ink Black has the HEX code #1C1C1C. In RGB color coordinates, its values are 28, 28, 28. In HSL, it is 0°, 0%, 11%. In CMYK print values, it corresponds to C:0% M:0% Y:0% K:89%.

Luminance: 1% · Nearest standard name: Sumi Ink Black

Generate Around This Color

SUMI INK BLACK

#1C1C1C

rgb(28, 28, 28) · hsl(0°, 0%, 11%)

HEX#1C1C1C

RGB28, 28, 28

HSL0°, 0%, 11%

HSV / HSB0°, 0%, 11%

CMYK (Print)0%, 0%, 0%, 89%

Color Harmonies

Complementary

#1C1C1C#1C1C1C

Analogous

#1C1C1C#1C1C1C#1C1C1C

Triadic

#1C1C1C#1C1C1C#1C1C1C

Tints & Shades

Lighter Tints

Darker Shades

WCAG 2.2 Contrast Verification

Against White (#FFFFFF)17.04:1

Sample text rendered with #1C1C1C on white

AA Normal: PASSAA Large: PASS

Against Dark (#0F172A)1.05:1

Sample text rendered with #1C1C1C on dark

AA Normal: FAILAA Large: FAIL

Palettes Featuring Similar Tones

cp-featured-01Technology

TechModernCool

cp-featured-02Sunset

SunsetGradientCreative

cp-featured-03Vintage

VintageRetroWarm

cp-featured-04Gaming

Cyber Glitch Protocol

GamingFuturisticNeon

Comprehensive Color Profile & Design Architecture

The Complete Color Guide to Sumi Ink Black (#1C1C1C)

Sumi Ink Black (#1C1C1C) is a distinct shade within the Slate & Neutral chromatic spectrum. Characterized by an optical luminance of 1% and a neutral 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#1C1C1C

RGB Space28, 28, 28

HSL Values0°, 0%, 11%

HSV / HSB0°, 0%, 11%

CMYK Ink0%, 0%, 0%, 89%

TemperatureNeutral

Optical Color Harmony Formulas for Sumi Ink Black

Geometric intervals calculated from #1C1C1C on the 360-degree color wheel.

Direct Polar (180°)#1C1C1C

Complementary Harmony

Pairs Sumi Ink Black with its polar opposite (#1C1C1C) to create maximum optical contrast, perfect for high-converting call-to-action buttons.

Adjacent (±30°)#1C1C1C · #1C1C1C

Analogous Harmony

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

Split Angles (150° / 210°)#1C1C1C · #1C1C1C

Split-Complementary

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

Triangular (120°)#1C1C1C · #1C1C1C

Triadic Harmony

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

Rectangular (90°)#1C1C1C · #1C1C1C · #1C1C1C

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 Sumi Ink Black

Lock #1C1C1C inside our interactive generator to calculate live matching palettes in real time.

Launch Palette Generator

The 60-30-10 UI Implementation Role for Sumi Ink Black

Recommended proportional volume and semantic interface assignment.

Recommended Assignment: High-Contrast Dark Canvas / Typographic Anchor (30% to 60% Volume)

With a deep, low lightness of 11%, Sumi Ink Black (#1C1C1C) provides structural weight for primary headings, body copy, and dark mode background canvases, delivering superior readability against light elements.

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 Sumi Ink Black with intentional neutral whitespace reinforces authority and conversion clarity.

Production Code Tokens for Sumi Ink Black

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

CSS Custom Properties (:root)Vanilla CSS

:root {
  --color-1c1c1c: #1C1C1C;
  --color-1c1c1c-rgb: 28, 28, 28;
  --color-1c1c1c-hsl: 0deg 0% 11%;
}

tailwind.config.jsTailwind CSS

module.exports = {
  theme: {
    extend: {
      colors: {
        '1c1c1c': '#1C1C1C',
      }
    }
  }
};

Explore Related Color Tools for Sumi Ink Black

Continue developing your color system with specialized design tools.

Palette Generator

Generate harmonious 5-color palettes anchored to Sumi Ink Black.

Launch Tool

WCAG Contrast Checker

Verify Level AA and AAA readability for Sumi Ink Black against any background.

Check Contrast

Shades & Tints Scale

Generate a full 10-step tonal scale from 50 to 900 for Sumi Ink Black.

Expand Scale

CSS Gradient Generator

Create linear and radial gradients blending Sumi Ink Black with complementary hues.

Build Gradients

Frequently Asked Questions About Sumi Ink Black (#1C1C1C)

Authoritative answers covering Sumi Ink Black color codes, WCAG contrast compliance, and UI design systems.

What are the exact digital and print color codes for Sumi Ink Black (#1C1C1C)?

Sumi Ink Black is defined by the HEX code #1C1C1C. Its digital screen RGB coordinates are R:28, G:28, B:28. Its cylindrical HSL values are Hue:0°, Saturation:0%, Lightness:11%. In HSV/HSB format, it is 0°, 0%, 11%. For four-color CMYK process printing, its ink percentages are C:0%, M:0%, Y:0%, K:89%.

Does Sumi Ink Black (#1C1C1C) pass WCAG 2.2 accessibility standards for text readability?

Against a pure white (#FFFFFF) background, Sumi Ink Black achieves a contrast ratio of 17.04:1 (Passing WCAG AA for normal body text, and Passing for large headings). Against dark slate (#0F172A), it achieves a contrast ratio of 1.05:1 (Failing WCAG AA).

What is the direct complementary color for Sumi Ink Black (#1C1C1C)?

The exact 180-degree optical complementary color for #1C1C1C is #1C1C1C. When placed side-by-side, #1C1C1C and #1C1C1C create maximum visual tension and high click-through conversion rates.

What is the recommended role for Sumi Ink Black in the 60-30-10 UI design rule?

How can I copy and export Sumi Ink Black into Tailwind CSS and CSS variables?

You can define Sumi Ink Black in CSS custom properties as ':root { --color-custom: #1C1C1C; }' or paste it into your 'tailwind.config.js' file under 'theme.extend.colors'. You can also generate full palettes containing Sumi Ink Black using our interactive Color Palette Generator.

Which color family does Sumi Ink Black (#1C1C1C) belong to?

Sumi Ink Black belongs to the Slate & Neutral family (Neutral spectrum). You can explore full tonal ramps and curated palettes in our Slate & Neutral Color Guide.