diff --git a/glymur/jp2box.py b/glymur/jp2box.py
index b8361d3..613d6f2 100644
--- a/glymur/jp2box.py
+++ b/glymur/jp2box.py
@@ -150,7 +150,7 @@ class ColourSpecificationBox(Jp2kBox):
         boxes.
     approximation : int
         Measure of colorspace accuracy.
-    color_space : int or None
+    colorspace : int or None
         Enumerated colorspace, corresponds to one of 'sRGB', 'greyscale', or
         'YCC'.  If not None, then icc_profile must be None.
     icc_profile : byte array or None
@@ -170,8 +170,8 @@ class ColourSpecificationBox(Jp2kBox):
         if self.approximation is not 0:
             x = _approximation_display[self.approximation]
             msg += '\n    Approximation:  {0}'.format(x)
-        if self.color_space is not None:
-            x = _colorspace_map_display[self.color_space]
+        if self.colorspace is not None:
+            x = _colorspace_map_display[self.colorspace]
             msg += '\n    Colorspace:  {0}'.format(x)
         else:
             x = len(self.icc_profile)
@@ -214,12 +214,12 @@ class ColourSpecificationBox(Jp2kBox):
         if method == 1:
             # enumerated colour space
             buffer = f.read(4)
-            kwargs['color_space'], = struct.unpack('>I', buffer)
+            kwargs['colorspace'], = struct.unpack('>I', buffer)
             kwargs['icc_profile'] = None
 
         else:
             # ICC profile
-            kwargs['color_space'] = None
+            kwargs['colorspace'] = None
             n = offset + length - f.tell()
             kwargs['icc_profile'] = f.read(n)
 
diff --git a/glymur/test/test_jp2k.py b/glymur/test/test_jp2k.py
index f84bd40..a32cda8 100644
--- a/glymur/test/test_jp2k.py
+++ b/glymur/test/test_jp2k.py
@@ -220,7 +220,7 @@ class TestJp2k(unittest.TestCase):
         self.assertEqual(jp2k.box[2].box[1].longname, 'Colour Specification')
         self.assertEqual(jp2k.box[2].box[1].precedence, 0)
         self.assertEqual(jp2k.box[2].box[1].approximation, 0)
-        self.assertEqual(jp2k.box[2].box[1].color_space, glymur.core.SRGB)
+        self.assertEqual(jp2k.box[2].box[1].colorspace, glymur.core.SRGB)
         self.assertIsNone(jp2k.box[2].box[1].icc_profile)
 
     @unittest.skipIf(data_root is None,
@@ -370,14 +370,14 @@ class TestJp2k(unittest.TestCase):
             j = Jp2k(tfile.name, 'wb')
             data = np.zeros((128, 128, 3), dtype=np.uint8)
             j.write(data, colorspace='rgb')
-            self.assertEqual(j.box[2].box[1].color_space, glymur.core.SRGB)
+            self.assertEqual(j.box[2].box[1].colorspace, glymur.core.SRGB)
 
     def test_specify_gray(self):
         with tempfile.NamedTemporaryFile(suffix='.jp2') as tfile:
             j = Jp2k(tfile.name, 'wb')
             data = np.zeros((128, 128), dtype=np.uint8)
             j.write(data, colorspace='gray')
-            self.assertEqual(j.box[2].box[1].color_space,
+            self.assertEqual(j.box[2].box[1].colorspace,
                              glymur.core.GREYSCALE)
 
     def test_specify_grey(self):
@@ -385,7 +385,7 @@ class TestJp2k(unittest.TestCase):
             j = Jp2k(tfile.name, 'wb')
             data = np.zeros((128, 128), dtype=np.uint8)
             j.write(data, colorspace='grey')
-            self.assertEqual(j.box[2].box[1].color_space,
+            self.assertEqual(j.box[2].box[1].colorspace,
                              glymur.core.GREYSCALE)
 
     def test_grey_with_extra_component(self):
@@ -396,7 +396,7 @@ class TestJp2k(unittest.TestCase):
             self.assertEqual(j.box[2].box[0].height, 128)
             self.assertEqual(j.box[2].box[0].width, 128)
             self.assertEqual(j.box[2].box[0].num_components, 2)
-            self.assertEqual(j.box[2].box[1].color_space,
+            self.assertEqual(j.box[2].box[1].colorspace,
                              glymur.core.GREYSCALE)
 
     def test_grey_with_two_extra_components(self):
@@ -407,7 +407,7 @@ class TestJp2k(unittest.TestCase):
             self.assertEqual(j.box[2].box[0].height, 128)
             self.assertEqual(j.box[2].box[0].width, 128)
             self.assertEqual(j.box[2].box[0].num_components, 3)
-            self.assertEqual(j.box[2].box[1].color_space,
+            self.assertEqual(j.box[2].box[1].colorspace,
                              glymur.core.GREYSCALE)
 
     def test_rgb_with_extra_component(self):
@@ -418,7 +418,7 @@ class TestJp2k(unittest.TestCase):
             self.assertEqual(j.box[2].box[0].height, 128)
             self.assertEqual(j.box[2].box[0].width, 128)
             self.assertEqual(j.box[2].box[0].num_components, 4)
-            self.assertEqual(j.box[2].box[1].color_space, glymur.core.SRGB)
+            self.assertEqual(j.box[2].box[1].colorspace, glymur.core.SRGB)
 
     def test_specify_ycc(self):
         # We don't support writing YCC at the moment.
diff --git a/glymur/test/test_opj_suite.py b/glymur/test/test_opj_suite.py
index d9b5d11..15913e2 100644
--- a/glymur/test/test_opj_suite.py
+++ b/glymur/test/test_opj_suite.py
@@ -3403,7 +3403,7 @@ class TestSuite(unittest.TestCase):
         self.assertEqual(jp2.box[3].box[1].method, 1)
         self.assertEqual(jp2.box[3].box[1].precedence, 0)
         self.assertEqual(jp2.box[3].box[1].approximation, 1)  # JPX exact ??
-        self.assertEqual(jp2.box[3].box[1].color_space, glymur.core.SRGB)
+        self.assertEqual(jp2.box[3].box[1].colorspace, glymur.core.SRGB)
 
         # XML box
         tags = [x.tag for x in jp2.box[4].xml]
@@ -3445,7 +3445,7 @@ class TestSuite(unittest.TestCase):
         self.assertEqual(jp2.box[2].box[1].method, 1)
         self.assertEqual(jp2.box[2].box[1].precedence, 0)
         self.assertEqual(jp2.box[2].box[1].approximation, 1)  # JPX exact??
-        self.assertEqual(jp2.box[2].box[1].color_space, glymur.core.YCC)
+        self.assertEqual(jp2.box[2].box[1].colorspace, glymur.core.YCC)
 
         # Jp2 Header
         # Channel Definition
@@ -3491,7 +3491,7 @@ class TestSuite(unittest.TestCase):
         self.assertEqual(jp2.box[2].box[1].method, 1)
         self.assertEqual(jp2.box[2].box[1].precedence, 0)
         self.assertEqual(jp2.box[2].box[1].approximation, 1)  # JPX exact
-        self.assertEqual(jp2.box[2].box[1].color_space, glymur.core.YCC)
+        self.assertEqual(jp2.box[2].box[1].colorspace, glymur.core.YCC)
 
         # sub-sampling
         codestream = jp2.get_codestream()
@@ -3537,7 +3537,7 @@ class TestSuite(unittest.TestCase):
         self.assertEqual(jp2.box[2].box[1].method, 1)
         self.assertEqual(jp2.box[2].box[1].precedence, 0)
         self.assertEqual(jp2.box[2].box[1].approximation, 1)  # JPX exact?
-        self.assertEqual(jp2.box[2].box[1].color_space, glymur.core.GREYSCALE)
+        self.assertEqual(jp2.box[2].box[1].colorspace, glymur.core.GREYSCALE)
 
     def test_NR_file5_dump(self):
         # Three 8-bit components in the ROMM-RGB colourspace, encapsulated in a
@@ -3580,7 +3580,7 @@ class TestSuite(unittest.TestCase):
         self.assertEqual(jp2.box[3].box[1].precedence, 0)
         self.assertEqual(jp2.box[3].box[1].approximation, 1)  # JPX exact
         self.assertEqual(len(jp2.box[3].box[1].icc_profile), 546)
-        self.assertIsNone(jp2.box[3].box[1].color_space)
+        self.assertIsNone(jp2.box[3].box[1].colorspace)
 
         # Jp2 Header
         # Colour specification
@@ -3588,7 +3588,7 @@ class TestSuite(unittest.TestCase):
         self.assertEqual(jp2.box[3].box[2].precedence, 1)
         self.assertEqual(jp2.box[3].box[2].approximation, 1)  # JPX exact
         self.assertIsNone(jp2.box[3].box[2].icc_profile)
-        self.assertEqual(jp2.box[3].box[2].color_space,
+        self.assertEqual(jp2.box[3].box[2].colorspace,
                          glymur.core.ROMM_RGB)
 
     def test_NR_file6_dump(self):
@@ -3626,7 +3626,7 @@ class TestSuite(unittest.TestCase):
         self.assertEqual(jp2.box[2].box[1].precedence, 0)
         self.assertEqual(jp2.box[2].box[1].approximation, 1)  # JPX exact
         self.assertIsNone(jp2.box[2].box[1].icc_profile)
-        self.assertEqual(jp2.box[2].box[1].color_space,
+        self.assertEqual(jp2.box[2].box[1].colorspace,
                          glymur.core.GREYSCALE)
 
     def test_NR_file7_dump(self):
@@ -3675,7 +3675,7 @@ class TestSuite(unittest.TestCase):
         self.assertEqual(jp2.box[3].box[1].precedence, 0)
         self.assertEqual(jp2.box[3].box[1].approximation, 1)  # JPX exact
         self.assertEqual(len(jp2.box[3].box[1].icc_profile), 13332)
-        self.assertIsNone(jp2.box[3].box[1].color_space)
+        self.assertIsNone(jp2.box[3].box[1].colorspace)
 
         # Jp2 Header
         # Colour specification
@@ -3683,7 +3683,7 @@ class TestSuite(unittest.TestCase):
         self.assertEqual(jp2.box[3].box[2].precedence, 1)
         self.assertEqual(jp2.box[3].box[2].approximation, 1)  # JPX exact
         self.assertIsNone(jp2.box[3].box[2].icc_profile)
-        self.assertEqual(jp2.box[3].box[2].color_space,
+        self.assertEqual(jp2.box[3].box[2].colorspace,
                          glymur.core.E_SRGB)
 
     def test_NR_file8_dump(self):
@@ -3724,7 +3724,7 @@ class TestSuite(unittest.TestCase):
         self.assertEqual(jp2.box[2].box[1].precedence, 0)
         self.assertEqual(jp2.box[2].box[1].approximation, 1)  # JPX exact
         self.assertEqual(len(jp2.box[2].box[1].icc_profile), 414)
-        self.assertIsNone(jp2.box[2].box[1].color_space)
+        self.assertIsNone(jp2.box[2].box[1].colorspace)
 
         # XML box
         tags = [x.tag for x in jp2.box[3].xml]
@@ -3796,7 +3796,7 @@ class TestSuite(unittest.TestCase):
         self.assertEqual(jp2.box[2].box[3].precedence, 0)
         self.assertEqual(jp2.box[2].box[3].approximation, 1)  # JPX exact
         self.assertIsNone(jp2.box[2].box[3].icc_profile)
-        self.assertEqual(jp2.box[2].box[3].color_space, glymur.core.SRGB)
+        self.assertEqual(jp2.box[2].box[3].colorspace, glymur.core.SRGB)
 
     def test_NR_00042_j2k_dump(self):
         # Profile 3.
@@ -5272,7 +5272,7 @@ class TestSuite(unittest.TestCase):
         self.assertEqual(jp2.box[2].box[1].method, 1)
         self.assertEqual(jp2.box[2].box[1].precedence, 0)
         self.assertEqual(jp2.box[2].box[1].approximation, 0)  # not allowed?
-        self.assertEqual(jp2.box[2].box[1].color_space, glymur.core.SRGB)
+        self.assertEqual(jp2.box[2].box[1].colorspace, glymur.core.SRGB)
 
         c = jp2.box[3].main_header
 
@@ -5405,7 +5405,7 @@ class TestSuite(unittest.TestCase):
         self.assertEqual(jp2.box[2].box[1].method, 1)
         self.assertEqual(jp2.box[2].box[1].precedence, 0)
         self.assertEqual(jp2.box[2].box[1].approximation, 0)  # JP2
-        self.assertEqual(jp2.box[2].box[1].color_space, glymur.core.SRGB)
+        self.assertEqual(jp2.box[2].box[1].colorspace, glymur.core.SRGB)
 
         c = jp2.box[3].main_header
 
@@ -5533,7 +5533,7 @@ class TestSuite(unittest.TestCase):
         self.assertEqual(jp2.box[2].box[1].method, 1)
         self.assertEqual(jp2.box[2].box[1].precedence, 0)
         self.assertEqual(jp2.box[2].box[1].approximation, 0)  # JP2
-        self.assertEqual(jp2.box[2].box[1].color_space, glymur.core.YCC)
+        self.assertEqual(jp2.box[2].box[1].colorspace, glymur.core.YCC)
 
         c = jp2.box[3].main_header
 
@@ -5673,7 +5673,7 @@ class TestSuite(unittest.TestCase):
         self.assertEqual(jp2.box[3].box[1].method, 1)  # enumerated
         self.assertEqual(jp2.box[3].box[1].precedence, 2)
         self.assertEqual(jp2.box[3].box[1].approximation, 1)  # exact
-        self.assertEqual(jp2.box[3].box[1].color_space, glymur.core.SRGB)
+        self.assertEqual(jp2.box[3].box[1].colorspace, glymur.core.SRGB)
 
         # Jp2 Header
         # Palette box.
@@ -5784,7 +5784,7 @@ class TestSuite(unittest.TestCase):
         self.assertEqual(jp2.box[2].box[1].method, 1)
         self.assertEqual(jp2.box[2].box[1].precedence, 0)
         self.assertEqual(jp2.box[2].box[1].approximation, 0)
-        self.assertEqual(jp2.box[2].box[1].color_space, glymur.core.SRGB)
+        self.assertEqual(jp2.box[2].box[1].colorspace, glymur.core.SRGB)
 
         # Skip the 4th box, it is uknown.
 
@@ -5884,7 +5884,7 @@ class TestSuite(unittest.TestCase):
         self.assertEqual(jp2.box[3].box[1].method, 1)  # ICC
         self.assertEqual(jp2.box[3].box[1].precedence, 2)
         self.assertEqual(jp2.box[3].box[1].approximation, 1)  # JPX exact
-        self.assertEqual(jp2.box[3].box[1].color_space, glymur.core.SRGB)
+        self.assertEqual(jp2.box[3].box[1].colorspace, glymur.core.SRGB)
 
         c = jp2.box[4].main_header
 
@@ -5981,7 +5981,7 @@ class TestSuite(unittest.TestCase):
         self.assertEqual(jp2.box[2].box[1].method, 1)
         self.assertEqual(jp2.box[2].box[1].precedence, 0)
         self.assertEqual(jp2.box[2].box[1].approximation, 0)  # JP2
-        self.assertEqual(jp2.box[2].box[1].color_space, glymur.core.GREYSCALE)
+        self.assertEqual(jp2.box[2].box[1].colorspace, glymur.core.GREYSCALE)
 
         # Jp2 Header
         # Channel Definition
@@ -6100,7 +6100,7 @@ class TestSuite(unittest.TestCase):
         self.assertEqual(jp2.box[3].box[1].method, 1)  # enumerated
         self.assertEqual(jp2.box[3].box[1].precedence, 2)
         self.assertEqual(jp2.box[3].box[1].approximation, 1)  # JPX exact
-        self.assertEqual(jp2.box[3].box[1].color_space, glymur.core.CMYK)
+        self.assertEqual(jp2.box[3].box[1].colorspace, glymur.core.CMYK)
 
         # Jp2 Header
         # Palette box.
@@ -6214,7 +6214,7 @@ class TestSuite(unittest.TestCase):
         self.assertEqual(jp2.box[3].box[1].method, 1)  # enumerated
         self.assertEqual(jp2.box[3].box[1].precedence, 2)
         self.assertEqual(jp2.box[3].box[1].approximation, 1)  # JPX exact
-        self.assertEqual(jp2.box[3].box[1].color_space, glymur.core.SRGB)
+        self.assertEqual(jp2.box[3].box[1].colorspace, glymur.core.SRGB)
 
         # Jp2 Header
         # Palette box.
@@ -6322,7 +6322,7 @@ class TestSuite(unittest.TestCase):
         self.assertEqual(jp2.box[2].box[1].method, 1)
         self.assertEqual(jp2.box[2].box[1].precedence, 0)
         self.assertEqual(jp2.box[2].box[1].approximation, 0)  # JP2
-        self.assertEqual(jp2.box[2].box[1].color_space, glymur.core.YCC)
+        self.assertEqual(jp2.box[2].box[1].colorspace, glymur.core.YCC)
 
         c = jp2.box[3].main_header
 
@@ -6427,7 +6427,7 @@ class TestSuite(unittest.TestCase):
         self.assertEqual(jp2.box[2].box[1].precedence, 0)
         self.assertEqual(jp2.box[2].box[1].approximation, 0)  # JP2
         self.assertEqual(len(jp2.box[2].box[1].icc_profile), 1)
-        self.assertIsNone(jp2.box[2].box[1].color_space)
+        self.assertIsNone(jp2.box[2].box[1].colorspace)
 
         c = jp2.box[3].main_header
 
@@ -6523,7 +6523,7 @@ class TestSuite(unittest.TestCase):
         self.assertEqual(jp2.box[2].box[1].precedence, 0)
         self.assertEqual(jp2.box[2].box[1].approximation, 0)  # JP2
         self.assertEqual(len(jp2.box[2].box[1].icc_profile), 1)
-        self.assertIsNone(jp2.box[2].box[1].color_space)
+        self.assertIsNone(jp2.box[2].box[1].colorspace)
 
         c = jp2.box[3].main_header
 
@@ -6625,7 +6625,7 @@ class TestSuite(unittest.TestCase):
         self.assertEqual(jp2.box[3].box[1].precedence, 2)
         self.assertEqual(jp2.box[3].box[1].approximation, 1)  # JPX exact
         self.assertEqual(len(jp2.box[3].box[1].icc_profile), 1328)
-        self.assertIsNone(jp2.box[3].box[1].color_space)
+        self.assertIsNone(jp2.box[3].box[1].colorspace)
 
         # UUID boxes.  All mentioned in the RREQ box.
         self.assertEqual(jp2.box[2].vendor_feature[0], jp2.box[4].uuid)
diff --git a/glymur/test/test_opj_suite_write.py b/glymur/test/test_opj_suite_write.py
index 486521f..d511768 100644
--- a/glymur/test/test_opj_suite_write.py
+++ b/glymur/test/test_opj_suite_write.py
@@ -693,7 +693,7 @@ class TestSuiteWrite(unittest.TestCase):
             self.assertEqual(jp2.box[2].box[1].precedence, 0)
             self.assertEqual(jp2.box[2].box[1].approximation, 0)
             self.assertIsNone(jp2.box[2].box[1].icc_profile)
-            self.assertEqual(jp2.box[2].box[1].color_space, glymur.core.SRGB)
+            self.assertEqual(jp2.box[2].box[1].colorspace, glymur.core.SRGB)
 
             c = jp2.box[3].main_header