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rmagick

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Detects a dark color based on luminance W3 standarts ( https://www.w3.org/TR/WCAG20/#relativeluminancedef ). It has these options: is a hex color dark; is an Imagick pixel dark; is an Imagick pixel from a blob dark; is an area in a blob over a dark background. It can be useful to understand will a black colored text be visible or not over an area.

  • Updated Mar 26, 2025
  • Ruby

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