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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
#1D378C
RGB Values
29, 55, 140
HSL Values
226°, 66%, 33%
CMYK Values
79%, 61%, 0%, 45%

Color Variations & Tints

  • #2A4FCB

    Lightness: 48%

  • #2547B6

    Lightness: 43%

  • #213FA1

    Lightness: 38%

  • #1D378C

    Lightness: 33%

    Current color

  • #182E77

    Lightness: 28%

  • #142661

    Lightness: 23%

  • #101E4C

    Lightness: 18%

Accessibility

White Text
10.6
PASS
Black Text
2.0
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 #1D378C

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

Current: #1D378C

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