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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
#66A3D9
RGB Values
102, 163, 217
HSL Values
208°, 60%, 63%
CMYK Values
53%, 25%, 0%, 15%

Color Variations & Tints

  • #A5C9E9

    Lightness: 78%

  • #91BDE3

    Lightness: 73%

  • #7CB1DE

    Lightness: 68%

  • #66A3D9

    Lightness: 63%

    Current color

  • #5498D4

    Lightness: 58%

  • #3F8CCF

    Lightness: 53%

  • #317FC4

    Lightness: 48%

Accessibility

White Text
2.7
FAIL
Black Text
7.8
PASS
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 #66A3D9

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

Current: #66A3D9

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