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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
#178BD3
RGB Values
23, 139, 211
HSL Values
203°, 80%, 46%
CMYK Values
89%, 34%, 0%, 17%

Color Variations & Tints

  • #4CAEEB

    Lightness: 61%

  • #35A4E9

    Lightness: 56%

  • #1E99E6

    Lightness: 51%

  • #178BD3

    Lightness: 46%

    Current color

  • #157CBC

    Lightness: 41%

  • #126DA5

    Lightness: 36%

  • #105E8E

    Lightness: 31%

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 #178BD3

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

Current: #178BD3

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