diff --git a/app/(tabs)/_layout.tsx b/app/(tabs)/_layout.tsx
index 1746a83..43124ca 100644
--- a/app/(tabs)/_layout.tsx
+++ b/app/(tabs)/_layout.tsx
@@ -3,7 +3,12 @@ import Ionicons from "@expo/vector-icons/MaterialIcons"
 
 export default function TabLayout() {
   return (
-    <Tabs>
+    <Tabs
+      screenOptions={{
+        tabBarActiveTintColor: "#00D48C",
+        tabBarInactiveTintColor: "#94A3B8",
+      }}
+    >
       <Tabs.Screen name="index" options={{ title: '消息', tabBarIcon: ({ color }) => <Ionicons size={28} name="message" color={color} /> }} />
       <Tabs.Screen name="contacts" options={{ title: '通讯录', tabBarIcon: ({ color }) => <Ionicons size={28} name="assignment-ind" color={color} /> }} />
       <Tabs.Screen name="discover" options={{ title: '发现', tabBarIcon: ({ color }) => <Ionicons size={28} name="compass-calibration" color={color} /> }} />
diff --git a/app/_layout.tsx b/app/_layout.tsx
index 9095be4..da6d469 100644
--- a/app/_layout.tsx
+++ b/app/_layout.tsx
@@ -9,12 +9,28 @@ import { useColorScheme } from "react-native";
 
 import { AppBootstrapProvider } from "@/providers/app-bootstrap-provider";
 
+const lightTheme = {
+  ...DefaultTheme,
+  colors: {
+    ...DefaultTheme.colors,
+    primary: "#00D48C",
+  },
+};
+
+const darkTheme = {
+  ...DarkTheme,
+  colors: {
+    ...DarkTheme.colors,
+    primary: "#00D48C",
+  },
+};
+
 export default function RootLayout() {
   const colorScheme = useColorScheme();
 
   return (
     <AppBootstrapProvider>
-      <ThemeProvider value={colorScheme === "dark" ? DarkTheme : DefaultTheme}>
+      <ThemeProvider value={colorScheme === "dark" ? darkTheme : lightTheme}>
         <Stack>
           <Stack.Screen name="(tabs)" options={{ headerShown: false }} />
         </Stack>
diff --git a/global.css b/global.css
index e17184d..0f0c649 100644
--- a/global.css
+++ b/global.css
@@ -23,9 +23,9 @@
 
 @layer theme {
   @theme {
-    --color-brand-50: #f5f7ff;
-    --color-brand-100: #e9edff;
-    --color-brand-500: #4f6bd9;
-    --color-brand-700: #3147a6;
+    --color-brand-50: #e9fbf4;
+    --color-brand-100: #c7f5e3;
+    --color-brand-500: #00d48c;
+    --color-brand-700: #009d68;
   }
 }