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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
#253BC9
RGB Values
37, 59, 201
HSL Values
232°, 69%, 47%
CMYK Values
82%, 71%, 0%, 21%

Color Variations & Tints

  • #5B6DE1

    Lightness: 62%

  • #465ADD

    Lightness: 57%

  • #3047D9

    Lightness: 52%

  • #253BC9

    Lightness: 47%

    Current color

  • #2135B5

    Lightness: 42%

  • #1D2F9F

    Lightness: 37%

  • #19288A

    Lightness: 32%

Accessibility

White Text
8.2
PASS
Black Text
2.5
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 #253BC9

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

Current: #253BC9

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