/
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
#309AF3
RGB Values
48, 154, 243
HSL Values
207°, 89%, 57%
CMYK Values
80%, 37%, 0%, 5%

Color Variations & Tints

  • #78BEF7

    Lightness: 72%

  • #60B2F6

    Lightness: 67%

  • #48A7F4

    Lightness: 62%

  • #309AF3

    Lightness: 57%

    Current color

  • #188FF2

    Lightness: 52%

  • #0D83E3

    Lightness: 47%

  • #0C75CA

    Lightness: 42%

Accessibility

White Text
3.0
FAIL
Black Text
7.0
PASS
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 #309AF3

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

Current: #309AF3

Discover More Colors

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