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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
#639DE3
RGB Values
99, 157, 227
HSL Values
213°, 70%, 64%
CMYK Values
56%, 31%, 0%, 11%

Color Variations & Tints

  • #A4C6EF

    Lightness: 79%

  • #8EB8EB

    Lightness: 74%

  • #79AAE7

    Lightness: 69%

  • #639DE3

    Lightness: 64%

    Current color

  • #4D8FE0

    Lightness: 59%

  • #3881DC

    Lightness: 54%

  • #2574D4

    Lightness: 49%

Accessibility

White Text
2.8
FAIL
Black Text
7.5
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 #639DE3

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

Current: #639DE3

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