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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
#3F7DE9
RGB Values
63, 125, 233
HSL Values
218°, 79%, 58%
CMYK Values
73%, 46%, 0%, 9%

Color Variations & Tints

  • #84ACF1

    Lightness: 73%

  • #6D9CEE

    Lightness: 68%

  • #568DEB

    Lightness: 63%

  • #3F7DE9

    Lightness: 58%

    Current color

  • #286EE6

    Lightness: 53%

  • #1A61DB

    Lightness: 48%

  • #1757C4

    Lightness: 43%

Accessibility

White Text
3.9
FAIL
Black Text
5.3
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 #3F7DE9

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

Current: #3F7DE9

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