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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
#4273FD
RGB Values
66, 115, 253
HSL Values
224°, 98%, 63%
CMYK Values
74%, 55%, 0%, 1%

Color Variations & Tints

  • #90ADFE

    Lightness: 78%

  • #779BFE

    Lightness: 73%

  • #5D88FD

    Lightness: 68%

  • #4273FD

    Lightness: 63%

    Current color

  • #2B63FD

    Lightness: 58%

  • #1250FD

    Lightness: 53%

  • #0242F2

    Lightness: 48%

Accessibility

White Text
4.1
FAIL
Black Text
5.1
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 #4273FD

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

Current: #4273FD

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