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@charliepark

charliepark/contrasting_text_color.rb

Created July 18, 2010 12:03
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calculate contrast color in Ruby
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contrasting_text_color.rb
def convert_to_brightness_value(background_hex_color)
(background_hex_color.scan(/../).map {|color| color.hex}).sum
end
def contrasting_text_color(background_hex_color)
convert_to_brightness_value(background_hex_color) > 382.5 ? '#000' : '#fff'
end
@neohunter
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FF FF FF is 255 255 255.

382.5 is (255*3) / 2

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