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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
#370057
RGB Values
55, 0, 87
HSL Values
278°, 100%, 17%
CMYK Values
37%, 100%, 0%, 66%

Color Variations & Tints

  • #6700A3

    Lightness: 32%

  • #57008A

    Lightness: 27%

  • #470070

    Lightness: 22%

  • #370057

    Lightness: 17%

    Current color

  • #27003D

    Lightness: 12%

  • #170024

    Lightness: 7%

  • #06000A

    Lightness: 2%

Accessibility

White Text
16.2
PASS
Black Text
1.3
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 #370057

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

Current: #370057

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