Module: ColorNamer

Defined in:
lib/color_namer.rb

Defined Under Namespace

Classes: ColorNames

Class Method Summary collapse

Class Method Details

.color_names ⇒ Object 



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# File 'lib/color_namer.rb', line 54

def color_names
  ColorNamer::ColorNames.names
end

.name(color) ⇒ Object

You can pass any Color object to this method



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# File 'lib/color_namer.rb', line 20

def name(color) # You can pass any Color object to this method
  
  find_rgb     = color.to_rgb
  find_hsl     = color.to_hsl
  return_color = nil
  df           = nil
  
  self.color_names.each do |hash, name, shade|
    return [hash, name, shade] if "##{hash}" == find_rgb.html
    
    # This part is ported from Javascript version found at http://chir.ag/tech/download/ntc
    
    rgb = Color::RGB.from_html(hash)
    hsl = rgb.to_hsl
    ndf1 = ((find_rgb.red - rgb.red) ** 2) + ((find_rgb.green - rgb.green) ** 2) + ((find_rgb.blue - rgb.blue) ** 2)
    ndf2 = (
            (((find_hsl.h * 255) - (hsl.h * 255)) ** 2) + 
            (((find_hsl.s * 255) - (hsl.s * 255)) ** 2) + 
            (((find_hsl.l * 255) - (hsl.l * 255)) ** 2)
           ).abs
    
    ndf = ndf1 + ndf2 * 2
    
    if df.nil? or df > ndf
      df = ndf
      return_color = [hash, name, shade]
    end
    
  end
  
  return return_color
  
end

.name_from_html_hash(hash) ⇒ Object 



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# File 'lib/color_namer.rb', line 7

def name_from_html_hash(hash)
  color = Color::RGB.from_html(hash)
  name(color)
end

.name_from_rgb(*rgb) ⇒ Object

Raises:

  • (ArgumentError) 


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# File 'lib/color_namer.rb', line 12

def name_from_rgb(*rgb)
  rgb = rgb[0].split(',').map{ |v| v.strip } if rgb.size == 1
  raise ArgumentError, "Wrong format of RGB value. Use 'r,g,b' or [r,g,b]" if rgb.size < 3
  rgb.map!(&:to_i)
  color = Color::RGB.new(rgb[0], rgb[1], rgb[2])
  name(color)
end