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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
#3664B5
RGB Values
54, 100, 181
HSL Values
218°, 54%, 46%
CMYK Values
70%, 45%, 0%, 29%

Color Variations & Tints

  • #668DD1

    Lightness: 61%

  • #527FCB

    Lightness: 56%

  • #3F70C6

    Lightness: 51%

  • #3664B5

    Lightness: 46%

    Current color

  • #3059A1

    Lightness: 41%

  • #2A4F8D

    Lightness: 36%

  • #24447A

    Lightness: 31%

Accessibility

White Text
5.8
PASS
Black Text
3.6
FAIL
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 #3664B5

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

Current: #3664B5

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