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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
#253D8C
RGB Values
37, 61, 140
HSL Values
226°, 58%, 35%
CMYK Values
74%, 56%, 0%, 45%

Color Variations & Tints

  • #3658C9

    Lightness: 50%

  • #304FB5

    Lightness: 45%

  • #2B46A1

    Lightness: 40%

  • #253D8C

    Lightness: 35%

    Current color

  • #203579

    Lightness: 30%

  • #1B2C65

    Lightness: 25%

  • #152351

    Lightness: 20%

Accessibility

White Text
9.9
PASS
Black Text
2.1
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 #253D8C

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

Current: #253D8C

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