matplotlib · timhoffm · Jun 9, 2020 · Dec 3, 2019 · Jun 8, 2020
diff --git a/lib/mpl_toolkits/mplot3d/axes3d.py b/lib/mpl_toolkits/mplot3d/axes3d.py
@@ -2507,13 +2507,15 @@ def bar3d(self, x, y, z, dx, dy, dz, color=None,
         if color is None:
             color = [self._get_patches_for_fill.get_next_color()]
 
+        color = list(mcolors.to_rgba_array(color))
+
         if len(color) == len(x):
             # bar colors specified, need to expand to number of faces
             for c in color:
                 facecolors.extend([c] * 6)
         else:
             # a single color specified, or face colors specified explicitly
-            facecolors = list(mcolors.to_rgba_array(color))
+            facecolors = color
             if len(facecolors) < len(x):
                 facecolors *= (6 * len(x))
 

diff --git a/lib/mpl_toolkits/tests/test_mplot3d.py b/lib/mpl_toolkits/tests/test_mplot3d.py
@@ -36,6 +36,18 @@ def test_bar3d():
         ax.bar(xs, ys, zs=z, zdir='y', align='edge', color=cs, alpha=0.8)
 
 
+def test_bar3d_colors():
+    fig = plt.figure()
+    ax = fig.add_subplot(111, projection='3d')
+    for c in ['red', 'green', 'blue', 'yellow']:
+        xs = np.arange(len(c))
+        ys = np.zeros_like(xs)
+        zs = np.zeros_like(ys)
+        # Color names with same length as xs/ys/zs should not be split into
+        # individual letters.
+        ax.bar3d(xs, ys, zs, 1, 1, 1, color=c)
+
+
 @mpl3d_image_comparison(['bar3d_shaded.png'])
 def test_bar3d_shaded():
     x = np.arange(4)