def grayscale?(value)
      r(value) == b(value) && b(value) == g(value)
    end
def grayscale?(value)
      r(value) == b(value) && b(value) == g(value)
    end
Returns true if this color is fully transparent.

 @param [Integer] value The color to test.
 @return [true, false] True if the r, g and b component are equal.