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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
#1B4DE7
RGB Values
27, 77, 231
HSL Values
225°, 81%, 51%
CMYK Values
88%, 67%, 0%, 9%

Color Variations & Tints

  • #6285EF

    Lightness: 66%

  • #4B73EC

    Lightness: 61%

  • #3461EA

    Lightness: 56%

  • #1B4DE7

    Lightness: 51%

    Current color

  • #1646D4

    Lightness: 46%

  • #143EBD

    Lightness: 41%

  • #1137A6

    Lightness: 36%

Accessibility

White Text
6.4
PASS
Black Text
3.3
FAIL
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 #1B4DE7

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

Current: #1B4DE7

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