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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
#21A3F2
RGB Values
33, 163, 242
HSL Values
203°, 89%, 54%
CMYK Values
86%, 33%, 0%, 5%

Color Variations & Tints

  • #6AC0F6

    Lightness: 69%

  • #51B6F5

    Lightness: 64%

  • #39ACF3

    Lightness: 59%

  • #21A3F2

    Lightness: 54%

    Current color

  • #0E97EC

    Lightness: 49%

  • #0C88D4

    Lightness: 44%

  • #0B78BC

    Lightness: 39%

Accessibility

White Text
2.8
FAIL
Black Text
7.6
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 #21A3F2

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

Current: #21A3F2

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