text: def test():
  	print('hello world')
  	c = color(1,0.2,0.2, 1)
  	print(c)
  	print(c.r)
  	print(c.g)
  	print(c.b)
  	print(c.a)
  	c.a = 0.5
  	print(c.a)
  	c.b += 0.1
  	print(c.b)
  	d = c.darkened( 0.9 )
  	print(d)
  
  test()