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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
#4087DD
RGB Values
64, 135, 221
HSL Values
213°, 70%, 56%
CMYK Values
71%, 39%, 0%, 13%

Color Variations & Tints

  • #81B0E9

    Lightness: 71%

  • #6CA2E5

    Lightness: 66%

  • #5695E1

    Lightness: 61%

  • #4087DD

    Lightness: 56%

    Current color

  • #2B79DA

    Lightness: 51%

  • #236DC7

    Lightness: 46%

  • #1F61B2

    Lightness: 41%

Accessibility

White Text
3.7
FAIL
Black Text
5.7
PASS
WCAG AA
PASS
WCAG AAA
FAIL

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 #4087DD

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

Current: #4087DD

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