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Colorbook
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Color Information

Red

Complete color analysis with professional format conversions, accessibility metrics, and harmonious color combinations for your design projects.

HEX Format
#B3150B
RGB Values
179, 21, 11
HSL Values
4°, 88%, 37%
CMYK Values
0%, 88%, 94%, 30%

Color Variations & Tints

  • #F02719

    Lightness: 52%

  • #E11C0E

    Lightness: 47%

  • #C9190D

    Lightness: 42%

  • #B3150B

    Lightness: 37%

    Current color

  • #99130A

    Lightness: 32%

  • #811008

    Lightness: 27%

  • #690D07

    Lightness: 22%

Accessibility

White Text
6.9
PASS
Black Text
3.0
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 #B3150B

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

Current: #B3150B

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