diff --git a/docs/source/_static/unstructured.css b/docs/source/_static/unstructured.css
new file mode 100644
index 000000000..f3d9dea85
--- /dev/null
+++ b/docs/source/_static/unstructured.css
@@ -0,0 +1,9 @@
+/* Css to change color scheme of side navigation search bar */
+.wy-side-nav-search {
+    background-color: #122540;
+}
+
+/* For changing the color of sidebar */
+.wy-nav-side {
+    background: #122540;
+}
\ No newline at end of file
diff --git a/docs/source/conf.py b/docs/source/conf.py
index a5f412459..c77eec7cf 100644
--- a/docs/source/conf.py
+++ b/docs/source/conf.py
@@ -52,3 +52,6 @@ html_theme = "sphinx_rtd_theme"
 # relative to this directory. They are copied after the builtin static files,
 # so a file named "default.css" will overwrite the builtin "default.css".
 html_static_path = ["_static"]
+
+# Adding a custom css file in order to add custom css file and can change the necessary elements.
+html_css_files = ["unstructured.css"]