class HtmlColor
Public Instance Methods
best_contrast(colors)
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# File lib/generators/active_seed/templates/example_html_colors/html_color.rb, line 20 def best_contrast(colors) best_contrast = 0; return_color = "000000" colors.each do |c| contrast = self.luminosity_contrast(c) if contrast > best_contrast best_contrast = contrast return_color = c.hex_code end end return_color end
blue()
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# File lib/generators/active_seed/templates/example_html_colors/html_color.rb, line 41 def blue self.hex_code.to_i(16) & 255 end
green()
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# File lib/generators/active_seed/templates/example_html_colors/html_color.rb, line 37 def green (self.hex_code.to_i(16) >> 8) & 255 end
luminosity_contrast(compare)
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# File lib/generators/active_seed/templates/example_html_colors/html_color.rb, line 4 def luminosity_contrast(compare) lum1 = 0.2126 * (self.red/255 ** 2.2) + 0.7152 * (self.green/255 ** 2.2) + 0.0722 * (self.blue/255 ** 2.2) lum2 = 0.2126 * (compare.red/255 ** 2.2) + 0.7152 * (compare.green/255 ** 2.2) + 0.0722 * (compare.blue/255 ** 2.2) if(lum1 > lum2) return (lum1+0.05) / (lum2+0.05); else return (lum2+0.05) / (lum1+0.05); end end
red()
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# File lib/generators/active_seed/templates/example_html_colors/html_color.rb, line 33 def red (self.hex_code.to_i(16) >> 16) & 255 end