diff --git a/docs/_static/custom.css b/docs/_static/custom.css
new file mode 100644
index 0000000..1153f1f
--- /dev/null
+++ b/docs/_static/custom.css
@@ -0,0 +1,8 @@
+/* custom colors for titles */
+html[data-theme="light"] {
+  --pst-color-primary: #e58b22;
+}
+
+html[data-theme="dark"] {
+  --pst-color-primary: #e58b22;
+}
diff --git a/docs/conf.py b/docs/conf.py
index 0085594..fae04b0 100644
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -24,6 +24,8 @@
 # -- Options for HTML output ---------------------------------------------------
 html_theme = "sphinx_book_theme"
 html_title = "jupyter-sphinx"
+html_static_path = ["_static"]
+html_css_files = ["custom.css"]
 html_theme_options = {
     "repository_url": "https://github.com/jupyter/jupyter-sphinx",
     "use_repository_button": True,