diff --git a/src-tauri/src/models/connection.rs b/src-tauri/src/models/connection.rs
index db7c3017d7..00de06c8d7 100644
--- a/src-tauri/src/models/connection.rs
+++ b/src-tauri/src/models/connection.rs
@@ -12,6 +12,8 @@ pub struct ConnectionConfig {
     pub password: String,
     pub database: Option<String>,
     #[serde(default)]
+    pub color: Option<String>,
+    #[serde(default)]
     pub ssh_enabled: bool,
     #[serde(default)]
     pub ssh_host: String,
@@ -125,6 +127,7 @@ mod tests {
             username: username.to_string(),
             password: password.to_string(),
             database: database.map(str::to_string),
+            color: None,
             ssh_enabled: false,
             ssh_host: String::new(),
             ssh_port: 22,
diff --git a/src/App.vue b/src/App.vue
index d36e1a7f08..0ebf24af95 100644
--- a/src/App.vue
+++ b/src/App.vue
@@ -110,12 +110,33 @@ function connectionDisplayName(connectionId: string): string {
   return connectionStore.getConfig(connectionId)?.name || connectionId;
 }
 
+function connectionColor(connectionId: string): string {
+  return connectionStore.getConfig(connectionId)?.color || "";
+}
+
 function databaseDisplayName(database: string): string {
   const connection = activeConnection.value;
   if (connection?.db_type === "redis" && database !== "") return `db${database}`;
   return database || t("editor.noDatabase");
 }
 
+function tabDisplayTitle(tab: typeof queryStore.tabs[number]): string {
+  const database = databaseDisplayNameForTab(tab.connectionId, tab.database);
+  if (tab.mode === "data" && tab.tableMeta?.tableName) {
+    return `${database} | ${tab.tableMeta.tableName}`;
+  }
+  if (tab.mode === "query") {
+    return `${connectionDisplayName(tab.connectionId)} | ${database}`;
+  }
+  return tab.title;
+}
+
+function databaseDisplayNameForTab(connectionId: string, database: string): string {
+  const connection = connectionStore.getConfig(connectionId);
+  if (connection?.db_type === "redis" && database !== "") return `db${database}`;
+  return database || t("editor.noDatabase");
+}
+
 async function loadDatabaseOptions(connectionId: string) {
   const connection = connectionStore.getConfig(connectionId);
   if (!connection || loadingDatabaseOptions.value[connectionId]) return;
@@ -526,7 +547,8 @@ async function setupFileDrop() {
               :class="{ 'bg-background font-medium': tab.id === queryStore.activeTabId }"
               @click="queryStore.activeTabId = tab.id"
             >
-              <span>{{ tab.title }}</span>
+              <span v-if="connectionColor(tab.connectionId)" class="h-4 w-1 rounded-full shrink-0" :style="{ backgroundColor: connectionColor(tab.connectionId) }" />
+              <span>{{ tabDisplayTitle(tab) }}</span>
               <button
                 class="ml-1 rounded hover:bg-muted-foreground/20 p-0.5"
                 @click.stop="queryStore.closeTab(tab.id)"
@@ -540,6 +562,7 @@ async function setupFileDrop() {
           <div v-if="activeTab" class="flex flex-col flex-1 min-h-0">
             <div v-if="activeTab.mode === 'query'" class="h-8 shrink-0 border-b bg-background/80 px-3 flex items-center gap-2 text-xs text-muted-foreground">
               <Server class="h-3.5 w-3.5 shrink-0" />
+              <span v-if="activeConnection?.color" class="h-4 w-1 rounded-full shrink-0" :style="{ backgroundColor: activeConnection.color }" />
               <Select
                 :model-value="activeConnectionValue"
                 @update:model-value="changeActiveConnection"
@@ -555,7 +578,10 @@ async function setupFileDrop() {
                     :key="connection.id"
                     :value="connection.id"
                   >
-                    {{ connection.name }}
+                    <div class="flex items-center gap-2">
+                      <span v-if="connection.color" class="h-3.5 w-1 rounded-full shrink-0" :style="{ backgroundColor: connection.color }" />
+                      <span>{{ connection.name }}</span>
+                    </div>
                   </SelectItem>
                 </SelectContent>
               </Select>
@@ -710,6 +736,7 @@ async function setupFileDrop() {
                       @click="openConnectionQuery(connection.id)"
                     >
                       <DatabaseIcon :db-type="connection.db_type" class="h-4 w-4" />
+                      <span v-if="connection.color" class="h-5 w-1 rounded-full shrink-0" :style="{ backgroundColor: connection.color }" />
                       <div class="min-w-0 flex-1">
                         <div class="truncate text-sm font-medium">{{ connection.name }}</div>
                         <div class="truncate text-xs text-muted-foreground">
diff --git a/src/components/connection/ConnectionDialog.vue b/src/components/connection/ConnectionDialog.vue
index 4793fa4f44..df4f64a082 100644
--- a/src/components/connection/ConnectionDialog.vue
+++ b/src/components/connection/ConnectionDialog.vue
@@ -36,6 +36,7 @@ const defaultForm = (): Omit<ConnectionConfig, "id"> => ({
   username: "root",
   password: "",
   database: undefined,
+  color: "",
   ssh_enabled: false,
   ssh_host: "",
   ssh_port: 22,
@@ -48,6 +49,16 @@ const defaultForm = (): Omit<ConnectionConfig, "id"> => ({
 const form = ref(defaultForm());
 const selectedType = ref("mysql");
 
+const colorOptions = [
+  { value: "", class: "bg-transparent border-dashed", labelKey: "connection.colorNone" },
+  { value: "#22c55e", class: "bg-green-500", labelKey: "connection.colorGreen" },
+  { value: "#eab308", class: "bg-yellow-500", labelKey: "connection.colorYellow" },
+  { value: "#f97316", class: "bg-orange-500", labelKey: "connection.colorOrange" },
+  { value: "#ef4444", class: "bg-red-500", labelKey: "connection.colorRed" },
+  { value: "#3b82f6", class: "bg-blue-500", labelKey: "connection.colorBlue" },
+  { value: "#a855f7", class: "bg-purple-500", labelKey: "connection.colorPurple" },
+];
+
 watch(() => props.editConfig, (config) => {
   if (config) {
     editingId.value = config.id;
@@ -59,6 +70,7 @@ watch(() => props.editConfig, (config) => {
       username: config.username,
       password: config.password,
       database: config.database,
+      color: config.color || "",
       ssh_enabled: config.ssh_enabled || false,
       ssh_host: config.ssh_host || "",
       ssh_port: config.ssh_port || 22,
@@ -245,6 +257,21 @@ watch([() => editingId.value, () => open.value], () => {
           </Select>
         </div>
 
+        <div class="grid grid-cols-4 items-center gap-4">
+          <Label class="text-right">{{ t('connection.color') }}</Label>
+          <div class="col-span-3 flex items-center gap-1.5">
+            <button
+              v-for="color in colorOptions"
+              :key="color.value || 'none'"
+              type="button"
+              class="h-6 w-6 rounded-full border ring-offset-background transition hover:scale-105"
+              :class="[color.class, form.color === color.value ? 'ring-2 ring-ring ring-offset-2' : 'border-border']"
+              :title="t(color.labelKey)"
+              @click="form.color = color.value"
+            />
+          </div>
+        </div>
+
         <!-- SQLite / DuckDB: file path only -->
         <template v-if="form.db_type === 'sqlite' || form.db_type === 'duckdb'">
           <div class="grid grid-cols-4 items-center gap-4">
diff --git a/src/components/sidebar/TreeItem.vue b/src/components/sidebar/TreeItem.vue
index 0917f6e497..bb756168a6 100644
--- a/src/components/sidebar/TreeItem.vue
+++ b/src/components/sidebar/TreeItem.vue
@@ -223,6 +223,11 @@ const isConnected = computed(() =>
   props.node.type === "connection" && !!props.node.connectionId && connectionStore.connectedIds.has(props.node.connectionId)
 );
 
+const connectionColor = computed(() => {
+  const connectionId = props.node.connectionId;
+  return connectionId ? connectionStore.getConfig(connectionId)?.color || "" : "";
+});
+
 const CHILDREN_PAGE_SIZE = 100;
 const displayLimit = ref(CHILDREN_PAGE_SIZE);
 
@@ -269,6 +274,7 @@ async function showMore() {
           <span v-else class="w-3.5 h-3.5 shrink-0" />
           <DatabaseIcon v-if="node.type === 'connection'" :db-type="connectionStore.getConfig(node.connectionId || '')?.db_type || 'postgres'" class="w-3.5 h-3.5 shrink-0" />
           <component v-else :is="getIconInfo(node)?.icon || Database" class="w-3.5 h-3.5 shrink-0" :class="getIconInfo(node)?.colorClass" />
+          <span v-if="node.type === 'connection' && connectionColor" class="h-3 w-1.5 rounded-full shrink-0" :style="{ backgroundColor: connectionColor }" />
           <span class="truncate">{{ isGroupLabel(node) ? t(node.label) : node.label }}</span>
           <span v-if="node.type === 'connection' && node.connectionId && connectionStore.connectedIds.has(node.connectionId)" class="w-1.5 h-1.5 rounded-full bg-green-500 shrink-0" />
         </div>
diff --git a/src/i18n/locales/en.ts b/src/i18n/locales/en.ts
index ea56850fda..720c1b498b 100644
--- a/src/i18n/locales/en.ts
+++ b/src/i18n/locales/en.ts
@@ -41,6 +41,14 @@ export default {
     sshPasswordPlaceholder: "Leave empty to use key",
     sshKeyPath: "Key Path",
     compatible: "Compatible",
+    color: "Color",
+    colorNone: "No color",
+    colorGreen: "Green",
+    colorYellow: "Yellow",
+    colorOrange: "Orange",
+    colorRed: "Red",
+    colorBlue: "Blue",
+    colorPurple: "Purple",
   },
   editor: {
     pressToExecute: "Press Cmd+Enter to execute",
diff --git a/src/i18n/locales/zh-CN.ts b/src/i18n/locales/zh-CN.ts
index 5f67e29c5d..7dfb0ea327 100644
--- a/src/i18n/locales/zh-CN.ts
+++ b/src/i18n/locales/zh-CN.ts
@@ -41,6 +41,14 @@ export default {
     sshPasswordPlaceholder: "留空则使用密钥",
     sshKeyPath: "密钥路径",
     compatible: "兼容",
+    color: "颜色",
+    colorNone: "无颜色",
+    colorGreen: "绿色",
+    colorYellow: "黄色",
+    colorOrange: "橙色",
+    colorRed: "红色",
+    colorBlue: "蓝色",
+    colorPurple: "紫色",
   },
   editor: {
     pressToExecute: "按 Cmd+Enter 执行查询",
diff --git a/src/types/database.ts b/src/types/database.ts
index 7666ab928f..98c164376a 100644
--- a/src/types/database.ts
+++ b/src/types/database.ts
@@ -9,6 +9,7 @@ export interface ConnectionConfig {
   username: string;
   password: string;
   database?: string;
+  color?: string;
   ssh_enabled?: boolean;
   ssh_host?: string;
   ssh_port?: number;