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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
#138CF3
RGB Values
19, 140, 243
HSL Values
208°, 90%, 51%
CMYK Values
92%, 42%, 0%, 5%

Color Variations & Tints

  • #5AAEF6

    Lightness: 66%

  • #42A2F5

    Lightness: 61%

  • #2A96F4

    Lightness: 56%

  • #138CF3

    Lightness: 51%

    Current color

  • #0C7CDF

    Lightness: 46%

  • #0A6FC7

    Lightness: 41%

  • #0961AE

    Lightness: 36%

Accessibility

White Text
3.5
FAIL
Black Text
6.1
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 #138CF3

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

Current: #138CF3

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