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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
#637397
RGB Values
99, 115, 151
HSL Values
222°, 21%, 49%
CMYK Values
34%, 24%, 0%, 41%

Color Variations & Tints

  • #909BB6

    Lightness: 64%

  • #808EAC

    Lightness: 59%

  • #7180A2

    Lightness: 54%

  • #637397

    Lightness: 49%

    Current color

  • #596788

    Lightness: 44%

  • #4F5B78

    Lightness: 39%

  • #444F69

    Lightness: 34%

Accessibility

White Text
4.7
PASS
Black Text
4.4
FAIL
WCAG AA
PASS
WCAG AAA
FAIL

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 #637397

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

Current: #637397

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