/
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
#155FF9
RGB Values
21, 95, 249
HSL Values
221°, 95%, 53%
CMYK Values
92%, 62%, 0%, 2%

Color Variations & Tints

  • #6091FB

    Lightness: 68%

  • #4780FA

    Lightness: 63%

  • #2E6FFA

    Lightness: 58%

  • #155FF9

    Lightness: 53%

    Current color

  • #0650EF

    Lightness: 48%

  • #0547D6

    Lightness: 43%

  • #053FBD

    Lightness: 38%

Accessibility

White Text
5.2
PASS
Black Text
4.0
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 #155FF9

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

Current: #155FF9

Discover More Colors

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