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Colorbook
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Color Information

Black

Complete color analysis with professional format conversions, accessibility metrics, and harmonious color combinations for your design projects.

HEX Format
#21071D
RGB Values
33, 7, 29
HSL Values
309°, 65%, 8%
CMYK Values
0%, 79%, 12%, 87%

Color Variations & Tints

  • #611555

    Lightness: 23%

  • #4C1043

    Lightness: 18%

  • #370C30

    Lightness: 13%

  • #21071D

    Lightness: 8%

    Current color

  • #0D030B

    Lightness: 3%

  • #000000

    Lightness: 0%

  • #000000

    Lightness: 0%

Accessibility

White Text
18.9
PASS
Black Text
1.1
FAIL
WCAG AA
PASS
WCAG AAA
PASS

Accessibility Guide

Contrast Ratios
Higher values (4.5+) ensure better readability for users with visual impairments.
WCAG AA Standard
Minimum requirement: 4.5:1 contrast for normal text, 3:1 for large text.
WCAG AAA Standard
Enhanced level: 7:1 contrast for normal text, 4.5:1 for large text.

Color Harmonies

  • Complementary

    Colors opposite on the color wheel, creating high contrast

  • Triadic

    Three evenly spaced colors forming a triangle on the color wheel

  • Analogous

    Adjacent colors on the color wheel, creating harmony and unity

Be picky and fine tune your color: colors very near to #21071D

Systematic progression of extremely similar colors. Each color represents a precise step in lightness variation.

Current: #21071D

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