diff --git a/docs/_static/custom.css b/docs/_static/custom.css
index 0af9db6..f14b761 100644
--- a/docs/_static/custom.css
+++ b/docs/_static/custom.css
@@ -4,3 +4,12 @@ div.highlight-console pre span.go::before {
   margin-right: 10px;
   margin-left: 5px;
 }
+
+/* custom colors for titles */
+html[data-theme="light"] {
+  --pst-color-primary: #1a73e8;
+}
+
+html[data-theme="dark"] {
+  --pst-color-primary: #1a73e8;
+}