diff --git a/lmnet/lmnet/common.py b/lmnet/lmnet/common.py
index 197a28981..193ab8d3e 100644
--- a/lmnet/lmnet/common.py
+++ b/lmnet/lmnet/common.py
@@ -27,26 +27,26 @@ class Tasks(Enum):
 # Sample image is here
 # https://github.com/blue-oil/blueoil/tree/master/docs/_static/color_map.png
 COLOR_MAP = [
-    [192, 0,   128],  # COLOR00
-    [0,   128, 192],  # COLOR01
-    [0,   128, 64],   # COLOR02
-    [128, 0,   0],    # COLOR03
-    [64,  0,   128],  # COLOR04
-    [64,  0,   192],  # COLOR05
-    [192, 128, 64],   # COLOR06
-    [192, 192, 128],  # COLOR07
-    [64,  64,  128],  # COLOR08
-    [128, 0,   192],  # COLOR09
-    [192, 0,   64],   # COLOR10
-    [128, 128, 64],   # COLOR11
-    [192, 0,   192],  # COLOR12
-    [128, 64,  64],   # COLOR13
-    [64,  192, 128],  # COLOR14
-    [64,  64,  0],    # COLOR15
-    [128, 64,  128],  # COLOR16
-    [128, 128, 192],  # COLOR17
-    [0,   0,   192],  # COLOR18
-    [192, 128, 128]   # COLOR19
+    (192, 0,   128),  # COLOR00
+    (0,   128, 192),  # COLOR01
+    (0,   128, 64),   # COLOR02
+    (128, 0,   0),    # COLOR03
+    (64,  0,   128),  # COLOR04
+    (64,  0,   192),  # COLOR05
+    (192, 128, 64),   # COLOR06
+    (192, 192, 128),  # COLOR07
+    (64,  64,  128),  # COLOR08
+    (128, 0,   192),  # COLOR09
+    (192, 0,   64),   # COLOR10
+    (128, 128, 64),   # COLOR11
+    (192, 0,   192),  # COLOR12
+    (128, 64,  64),   # COLOR13
+    (64,  192, 128),  # COLOR14
+    (64,  64,  0),    # COLOR15
+    (128, 64,  128),  # COLOR16
+    (128, 128, 192),  # COLOR17
+    (0,   0,   192),  # COLOR18
+    (192, 128, 128)   # COLOR19
 ]
 
 
diff --git a/lmnet/tests/lmnet_tests/test_common.py b/lmnet/tests/lmnet_tests/test_common.py
index 29ca34a0e..efcc19f88 100644
--- a/lmnet/tests/lmnet_tests/test_common.py
+++ b/lmnet/tests/lmnet_tests/test_common.py
@@ -23,12 +23,12 @@
 def test_get_color_map_with_small_length():
     color_map = get_color_map(5)
     assert len(color_map) == 5
-    assert color_map[0] == [192, 0, 128]
-    assert color_map[4] == [64, 0, 128]
+    assert color_map[0] == (192, 0, 128)
+    assert color_map[4] == (64, 0, 128)
 
 
 def test_get_color_map_with_large_length():
     color_map = get_color_map(30)
     assert len(color_map) == 30
-    assert color_map[0] == [192, 0, 128]
-    assert color_map[29] == [128, 0, 192]
+    assert color_map[0] == (192, 0, 128)
+    assert color_map[29] == (128, 0, 192)