diff --git a/scanpy/plotting/palettes.py b/scanpy/plotting/palettes.py
index 99ee4a798f..7086549a4c 100644
--- a/scanpy/plotting/palettes.py
+++ b/scanpy/plotting/palettes.py
@@ -16,12 +16,15 @@
 
 # reorderd, some removed, some added
 vega_20_scanpy = [
+    # dark without grey:
     *vega_20[0:14:2],
-    *vega_20[16::2],  # dark without grey
+    *vega_20[16::2],
+    # light without grey:
     *vega_20[1:15:2],
-    *vega_20[17::2],  # light without grey
+    *vega_20[17::2],
+    # manual additions:
     '#ad494a',
-    '#8c6d31',  # manual additions
+    '#8c6d31',
 ]
 vega_20_scanpy[2] = vega_10_scanpy[2]
 vega_20_scanpy[4] = vega_10_scanpy[4]
@@ -58,10 +61,11 @@
     "#f3e1eb",
     "#f6c4e1",
     "#f79cd4",
+    # these last ones were added:
     '#7f7f7f',
     "#c7c7c7",
     "#1CE6FF",
-    "#336600",  # these last ones were added,
+    "#336600",
 ]
 
 default_28 = zeileis_28