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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
#0399EB
RGB Values
3, 153, 235
HSL Values
201°, 97%, 47%
CMYK Values
99%, 35%, 0%, 8%

Color Variations & Tints

  • #40BAFC

    Lightness: 62%

  • #27B1FC

    Lightness: 57%

  • #0EA8FB

    Lightness: 52%

  • #0399EB

    Lightness: 47%

    Current color

  • #038AD3

    Lightness: 42%

  • #037ABA

    Lightness: 37%

  • #0269A1

    Lightness: 32%

Accessibility

White Text
3.1
FAIL
Black Text
6.8
PASS
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 #0399EB

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

Current: #0399EB

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