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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
#1B3155
RGB Values
27, 49, 85
HSL Values
217°, 52%, 22%
CMYK Values
68%, 42%, 0%, 67%

Color Variations & Tints

  • #2D538F

    Lightness: 37%

  • #27487C

    Lightness: 32%

  • #213C69

    Lightness: 27%

  • #1B3155

    Lightness: 22%

    Current color

  • #152642

    Lightness: 17%

  • #0F1B2F

    Lightness: 12%

  • #09101B

    Lightness: 7%

Accessibility

White Text
13.0
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 #1B3155

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

Current: #1B3155

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