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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
#3F47D9
RGB Values
63, 71, 217
HSL Values
237°, 67%, 55%
CMYK Values
71%, 67%, 0%, 15%

Color Variations & Tints

  • #7F84E6

    Lightness: 70%

  • #6A70E2

    Lightness: 65%

  • #555BDD

    Lightness: 60%

  • #3F47D9

    Lightness: 55%

    Current color

  • #2A33D5

    Lightness: 50%

  • #262EC0

    Lightness: 45%

  • #2228AA

    Lightness: 40%

Accessibility

White Text
6.7
PASS
Black Text
3.1
FAIL
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 #3F47D9

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

Current: #3F47D9

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