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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
#273DBB
RGB Values
39, 61, 187
HSL Values
231°, 65%, 44%
CMYK Values
79%, 67%, 0%, 27%

Color Variations & Tints

  • #5267DA

    Lightness: 59%

  • #3D54D6

    Lightness: 54%

  • #2C44CE

    Lightness: 49%

  • #273DBB

    Lightness: 44%

    Current color

  • #2336A4

    Lightness: 39%

  • #1E2F8F

    Lightness: 34%

  • #1A287A

    Lightness: 29%

Accessibility

White Text
8.5
PASS
Black Text
2.5
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 #273DBB

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

Current: #273DBB

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