/
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
#153DAD
RGB Values
21, 61, 173
HSL Values
224°, 78%, 38%
CMYK Values
88%, 65%, 0%, 32%

Color Variations & Tints

  • #2A5CE5

    Lightness: 53%

  • #1B4EDA

    Lightness: 48%

  • #1846C3

    Lightness: 43%

  • #153DAD

    Lightness: 38%

    Current color

  • #133696

    Lightness: 33%

  • #102D7F

    Lightness: 28%

  • #0D2568

    Lightness: 23%

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 #153DAD

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

Current: #153DAD

Discover More Colors

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