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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
#3F99EF
RGB Values
63, 153, 239
HSL Values
209°, 85%, 59%
CMYK Values
74%, 36%, 0%, 6%

Color Variations & Tints

  • #84BFF5

    Lightness: 74%

  • #6DB2F3

    Lightness: 69%

  • #55A6F1

    Lightness: 64%

  • #3F99EF

    Lightness: 59%

    Current color

  • #268DED

    Lightness: 54%

  • #1380E7

    Lightness: 49%

  • #1173D0

    Lightness: 44%

Accessibility

White Text
3.0
FAIL
Black Text
7.0
PASS
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 #3F99EF

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

Current: #3F99EF

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