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Colorbook
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Color Information

Blue

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

HEX Format
#15315B
RGB Values
21, 49, 91
HSL Values
216°, 63%, 22%
CMYK Values
77%, 46%, 0%, 64%

Color Variations & Tints

  • #23529A

    Lightness: 37%

  • #1E4785

    Lightness: 32%

  • #193C70

    Lightness: 27%

  • #15315B

    Lightness: 22%

    Current color

  • #102647

    Lightness: 17%

  • #0B1B32

    Lightness: 12%

  • #07101D

    Lightness: 7%

Accessibility

White Text
12.9
PASS
Black Text
1.6
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 #15315B

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

Current: #15315B

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