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Colorbook
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Color Information

Gray

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

HEX Format
#637C55
RGB Values
99, 124, 85
HSL Values
98°, 19%, 41%
CMYK Values
20%, 0%, 31%, 51%

Color Variations & Tints

  • #89A479

    Lightness: 56%

  • #7C9A6A

    Lightness: 51%

  • #6F8C5F

    Lightness: 46%

  • #637C55

    Lightness: 41%

    Current color

  • #576D4A

    Lightness: 36%

  • #4B5E40

    Lightness: 31%

  • #3F4F36

    Lightness: 26%

Accessibility

White Text
4.6
PASS
Black Text
4.5
PASS
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 #637C55

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

Current: #637C55

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