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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
#21454B
RGB Values
33, 69, 75
HSL Values
189°, 39%, 21%
CMYK Values
56%, 8%, 0%, 71%

Color Variations & Tints

  • #387580

    Lightness: 36%

  • #30656E

    Lightness: 31%

  • #28545C

    Lightness: 26%

  • #21454B

    Lightness: 21%

    Current color

  • #193439

    Lightness: 16%

  • #112427

    Lightness: 11%

  • #091315

    Lightness: 6%

Accessibility

White Text
10.4
PASS
Black Text
2.0
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 #21454B

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

Current: #21454B

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