/
Colorbook
Sign in Sign up

Color Information

Blue

Complete color analysis with professional format conversions, accessibility metrics, and harmonious color combinations for your design projects.

HEX Format
#3666AB
RGB Values
54, 102, 171
HSL Values
215°, 52%, 44%
CMYK Values
68%, 40%, 0%, 33%

Color Variations & Tints

  • #608DCD

    Lightness: 59%

  • #4D80C7

    Lightness: 54%

  • #3C72BE

    Lightness: 49%

  • #3666AB

    Lightness: 44%

    Current color

  • #305B97

    Lightness: 39%

  • #2A4F84

    Lightness: 34%

  • #234470

    Lightness: 29%

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 #3666AB

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

Current: #3666AB

Discover More Colors

Explore a randomly curated selection of colors. Each refresh brings new inspiration for your palette.