diff --git a/.gitignore b/.gitignore
index d05bb26..2f76b92 100644
--- a/.gitignore
+++ b/.gitignore
@@ -11,3 +11,4 @@ __pycache__/
 .coverage
 *.h5ad
 *.json
+*.png
diff --git a/docs/source/conf.py b/docs/source/conf.py
index e5be94c..1f52e22 100644
--- a/docs/source/conf.py
+++ b/docs/source/conf.py
@@ -67,6 +67,7 @@ def get_version(rel_path):
 # a list of builtin themes.
 #
 html_theme = "furo"
+pygments_style = "tango"
 
 html_theme_options = {
     "footer_icons": [