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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
#1B21DA
RGB Values
27, 33, 218
HSL Values
238°, 78%, 48%
CMYK Values
88%, 85%, 0%, 15%

Color Variations & Tints

  • #575CEA

    Lightness: 63%

  • #4046E7

    Lightness: 58%

  • #2A30E5

    Lightness: 53%

  • #1B21DA

    Lightness: 48%

    Current color

  • #181EC3

    Lightness: 43%

  • #151AAC

    Lightness: 38%

  • #131796

    Lightness: 33%

Accessibility

White Text
9.2
PASS
Black Text
2.3
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 #1B21DA

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

Current: #1B21DA

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