diff --git a/src/components/mui/search-input.js b/src/components/mui/search-input.js
index 428d1235..fd0527d8 100644
--- a/src/components/mui/search-input.js
+++ b/src/components/mui/search-input.js
@@ -83,7 +83,10 @@ const SearchInput = ({ term, onSearch, placeholder = "Search...", debounced }) =
         "& .MuiOutlinedInput-root": {
           height: "36px",
           paddingX: 1
-        },        
+        },
+        "& .MuiOutlinedInput-root .MuiOutlinedInput-notchedOutline": { borderColor: "rgba(0, 0, 0, 0.23)" },
+        "& .MuiOutlinedInput-root:hover .MuiOutlinedInput-notchedOutline": { borderColor: "rgba(0, 0, 0, 0.23)" },
+        "& .MuiOutlinedInput-root.Mui-focused .MuiOutlinedInput-notchedOutline": { borderColor: "primary.main" }
       }}
     />
   );
diff --git a/src/utils/theme.js b/src/utils/theme.js
new file mode 100644
index 00000000..6a4816ec
--- /dev/null
+++ b/src/utils/theme.js
@@ -0,0 +1,49 @@
+/**
+ * Copyright 2026 OpenStack Foundation
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ * http://www.apache.org/licenses/LICENSE-2.0
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * */
+
+import { createTheme } from "@mui/material/styles";
+import KeyboardArrowDownIcon from "@mui/icons-material/KeyboardArrowDown";
+
+const uiCoreThemeOverrides = {
+  components: {
+    MuiOutlinedInput: {
+      styleOverrides: {
+        notchedOutline: {
+          borderColor: "#000"
+        },
+        root: {
+          "&:hover .MuiOutlinedInput-notchedOutline": {
+            borderColor: "#000"
+          },
+          "&.Mui-focused .MuiOutlinedInput-notchedOutline": {
+            borderColor: "#000"
+          }
+        }
+      }
+    },
+    MuiSelect: {
+      defaultProps: {
+        IconComponent: KeyboardArrowDownIcon
+      },
+      styleOverrides: {
+        icon: {
+          fontSize: "24px",
+          width: "24px",
+          height: "24px"
+        }
+      }
+    }
+  }
+};
+
+export const CustomThemeBase = createTheme(uiCoreThemeOverrides);
diff --git a/webpack.common.js b/webpack.common.js
index 6ff660ce..35385816 100644
--- a/webpack.common.js
+++ b/webpack.common.js
@@ -168,6 +168,7 @@ module.exports = {
         'utils/money': './src/utils/money.js',
         'utils/use-event-callback': './src/utils/use-event-callback.js',
         'utils/external-store': './src/utils/external-store.js',
+        'utils/theme': './src/utils/theme.js',
     },
     output: {
         path: path.resolve(__dirname, 'lib'),