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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
#1537DF
RGB Values
21, 55, 223
HSL Values
230°, 83%, 48%
CMYK Values
91%, 75%, 0%, 13%

Color Variations & Tints

  • #526CEF

    Lightness: 63%

  • #3B59ED

    Lightness: 58%

  • #2445EB

    Lightness: 53%

  • #1537DF

    Lightness: 48%

    Current color

  • #1331C9

    Lightness: 43%

  • #102BB1

    Lightness: 38%

  • #0E269A

    Lightness: 33%

Accessibility

White Text
7.9
PASS
Black Text
2.6
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 #1537DF

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

Current: #1537DF

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