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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
#1B3CF3
RGB Values
27, 60, 243
HSL Values
231°, 90%, 53%
CMYK Values
89%, 75%, 0%, 5%

Color Variations & Tints

  • #647AF7

    Lightness: 68%

  • #4C65F6

    Lightness: 63%

  • #3450F4

    Lightness: 58%

  • #1B3CF3

    Lightness: 53%

    Current color

  • #0C2DE9

    Lightness: 48%

  • #0B29D0

    Lightness: 43%

  • #0A24B8

    Lightness: 38%

Accessibility

White Text
7.0
PASS
Black Text
3.0
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 #1B3CF3

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

Current: #1B3CF3

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