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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
#123BB4
RGB Values
18, 59, 180
HSL Values
225°, 82%, 39%
CMYK Values
90%, 67%, 0%, 29%

Color Variations & Tints

  • #2A5AEA

    Lightness: 54%

  • #164AE3

    Lightness: 49%

  • #1442CC

    Lightness: 44%

  • #123BB4

    Lightness: 39%

    Current color

  • #10339E

    Lightness: 34%

  • #0D2C87

    Lightness: 29%

  • #0B246F

    Lightness: 24%

Accessibility

White Text
9.1
PASS
Black Text
2.3
FAIL
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 #123BB4

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

Current: #123BB4

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