code: def rgb_to_html(r, g=None, b=None):
    
    if type(r) in [list,tuple]:
      r, g, b = r
    return '#%02x%02x%02x' % tuple((min(round(v*255), 255) for v in (r, g, b)))
docs: Convert the color from (r, g, b) to #RRGGBB.
  
    Parameters:
      :r:
        The Red component value [0...1]
      :g:
        The Green component value [0...1]
      :b:
        The Blue component value [0...1]
  
    Returns:
      A CSS string representation of this color (#RRGGBB).
  
    >>> rgb_to_html(1, 0.5, 0)
    '#ff8000'