code: def test_blue():
      assert Color("black").blue == 0
      assert Color("blue").blue == 1
      assert Color("white").blue == 1
      assert 0.5 <= Color("rgba(0, 0, 128, 1)").blue < 0.51
      c = Color("none")
      c.blue = 1
      assert c.blue == 1
  
imports: import ctypes
  import time
  import warnings
  from pytest import mark, raises
  from wand.color import Color
  from wand.compat import xrange
  from wand.version import QUANTUM_DEPTH, MAGICK_VERSION_INFO
label_desc: Use image node_id 9 for calling a global function with example usage: test_blue() without return types