diff --git a/packages/frontend/src/App.vue b/packages/frontend/src/App.vue
index c2f8b1d..371388c 100644
--- a/packages/frontend/src/App.vue
+++ b/packages/frontend/src/App.vue
@@ -252,17 +252,17 @@ const isElementVisibleAndFocusable = (element: HTMLElement): boolean => {
         <!-- Left navigation links with Tailwind classes using theme variables -->
         <div class="flex items-center space-x-1">
             <!-- <RouterLink to="/">{{ t('nav.dashboard') }}</RouterLink> --> <!-- 隐藏仪表盘链接 -->
-            <RouterLink to="/workspace" class="px-3 py-2 rounded-md text-sm font-medium text-secondary hover:text-link-hover hover:bg-link-active-bg hover:no-underline transition duration-150 ease-in-out whitespace-nowrap" active-class="text-link-active bg-link-active-bg">{{ t('nav.terminal') }}</RouterLink>
-            <RouterLink to="/proxies" class="px-3 py-2 rounded-md text-sm font-medium text-secondary hover:text-link-hover hover:bg-link-active-bg hover:no-underline transition duration-150 ease-in-out whitespace-nowrap" active-class="text-link-active bg-link-active-bg">{{ t('nav.proxies') }}</RouterLink>
-            <RouterLink to="/notifications" class="px-3 py-2 rounded-md text-sm font-medium text-secondary hover:text-link-hover hover:bg-link-active-bg hover:no-underline transition duration-150 ease-in-out whitespace-nowrap" active-class="text-link-active bg-link-active-bg">{{ t('nav.notifications') }}</RouterLink>
-            <RouterLink to="/audit-logs" class="px-3 py-2 rounded-md text-sm font-medium text-secondary hover:text-link-hover hover:bg-link-active-bg hover:no-underline transition duration-150 ease-in-out whitespace-nowrap" active-class="text-link-active bg-link-active-bg">{{ t('nav.auditLogs') }}</RouterLink>
-            <RouterLink to="/settings" class="px-3 py-2 rounded-md text-sm font-medium text-secondary hover:text-link-hover hover:bg-link-active-bg hover:no-underline transition duration-150 ease-in-out whitespace-nowrap" active-class="text-link-active bg-link-active-bg">{{ t('nav.settings') }}</RouterLink>
+            <RouterLink to="/workspace" class="px-3 py-2 rounded-md text-sm font-medium text-secondary hover:text-link-hover hover:bg-nav-active-bg hover:no-underline transition duration-150 ease-in-out whitespace-nowrap" active-class="text-link-active bg-nav-active-bg">{{ t('nav.terminal') }}</RouterLink>
+            <RouterLink to="/proxies" class="px-3 py-2 rounded-md text-sm font-medium text-secondary hover:text-link-hover hover:bg-nav-active-bg hover:no-underline transition duration-150 ease-in-out whitespace-nowrap" active-class="text-link-active bg-nav-active-bg">{{ t('nav.proxies') }}</RouterLink>
+            <RouterLink to="/notifications" class="px-3 py-2 rounded-md text-sm font-medium text-secondary hover:text-link-hover hover:bg-nav-active-bg hover:no-underline transition duration-150 ease-in-out whitespace-nowrap" active-class="text-link-active bg-nav-active-bg">{{ t('nav.notifications') }}</RouterLink>
+            <RouterLink to="/audit-logs" class="px-3 py-2 rounded-md text-sm font-medium text-secondary hover:text-link-hover hover:bg-nav-active-bg hover:no-underline transition duration-150 ease-in-out whitespace-nowrap" active-class="text-link-active bg-nav-active-bg">{{ t('nav.auditLogs') }}</RouterLink>
+            <RouterLink to="/settings" class="px-3 py-2 rounded-md text-sm font-medium text-secondary hover:text-link-hover hover:bg-nav-active-bg hover:no-underline transition duration-150 ease-in-out whitespace-nowrap" active-class="text-link-active bg-nav-active-bg">{{ t('nav.settings') }}</RouterLink>
         </div>
         <!-- Right navigation links with Tailwind classes using theme variables -->
         <div class="flex items-center space-x-1">
-            <a href="#" @click.prevent="openStyleCustomizer" :title="t('nav.customizeStyle')" class="px-2 py-2 rounded-md text-lg text-icon hover:text-icon-hover hover:bg-link-active-bg hover:no-underline transition duration-150 ease-in-out">🎨</a>
-            <RouterLink v-if="!isAuthenticated" to="/login" class="px-3 py-2 rounded-md text-sm font-medium text-secondary hover:text-link-hover hover:bg-link-active-bg hover:no-underline transition duration-150 ease-in-out whitespace-nowrap">{{ t('nav.login') }}</RouterLink>
-            <a href="#" v-if="isAuthenticated" @click.prevent="handleLogout" class="px-3 py-2 rounded-md text-sm font-medium text-secondary hover:text-link-hover hover:bg-link-active-bg hover:no-underline transition duration-150 ease-in-out whitespace-nowrap">{{ t('nav.logout') }}</a>
+            <a href="#" @click.prevent="openStyleCustomizer" :title="t('nav.customizeStyle')" class="px-2 py-2 rounded-md text-lg text-icon hover:text-icon-hover hover:bg-nav-active-bg hover:no-underline transition duration-150 ease-in-out">🎨</a>
+            <RouterLink v-if="!isAuthenticated" to="/login" class="px-3 py-2 rounded-md text-sm font-medium text-secondary hover:text-link-hover hover:bg-nav-active-bg hover:no-underline transition duration-150 ease-in-out whitespace-nowrap">{{ t('nav.login') }}</RouterLink>
+            <a href="#" v-if="isAuthenticated" @click.prevent="handleLogout" class="px-3 py-2 rounded-md text-sm font-medium text-secondary hover:text-link-hover hover:bg-nav-active-bg hover:no-underline transition duration-150 ease-in-out whitespace-nowrap">{{ t('nav.logout') }}</a>
         </div>
         <!-- Sliding underline element with Tailwind classes using theme variables (JS still controls positioning) -->
         <div ref="underlineRef" class="absolute bottom-0 h-0.5 bg-link-active rounded transition-all duration-300 ease-in-out pointer-events-none opacity-0"></div> <!-- Added opacity-0 -->
diff --git a/packages/frontend/src/components/StyleCustomizer.vue b/packages/frontend/src/components/StyleCustomizer.vue
index 7fab51b..b4e8f22 100644
--- a/packages/frontend/src/components/StyleCustomizer.vue
+++ b/packages/frontend/src/components/StyleCustomizer.vue
@@ -766,6 +766,14 @@ watch(() => editingTheme.value?.themeData, (newThemeData) => {
     }
 }, { deep: true }); // 需要 deep watch 来监听 themeData 内部的变化
 
+// Helper function to safely select text in an input on focus
+const handleFocusAndSelect = (event: FocusEvent) => {
+  const target = event.target;
+  if (target instanceof HTMLInputElement) {
+    target.select();
+  }
+};
+
 </script>
 
 
@@ -798,21 +806,34 @@ watch(() => editingTheme.value?.themeData, (newThemeData) => {
             <!-- 动态生成 UI 样式编辑控件 -->
             <div v-for="(value, key) in editableUiTheme" :key="key" class="form-group">
               <label :for="`ui-${key}`">{{ formatLabel(key) }}:</label>
-              <!-- 简单判断是否为颜色值，显示颜色选择器 -->
-              <input
-                v-if="typeof value === 'string' && (value.startsWith('#') || value.startsWith('rgb') || value.startsWith('hsl'))"
-                type="color"
-                :id="`ui-${key}`"
-                v-model="editableUiTheme[key]"
-              />
-              <!-- 否则显示文本输入框 -->
-              <input
-                v-else
-                type="text"
-                :id="`ui-${key}`"
-                v-model="editableUiTheme[key]"
-                class="text-input"
-              />
+              <!-- Container for color picker and text display -->
+              <div class="color-input-group">
+                <!-- Color Picker -->
+                <input
+                  v-if="typeof value === 'string' && (value.startsWith('#') || value.startsWith('rgb') || value.startsWith('hsl'))"
+                  type="color"
+                  :id="`ui-${key}`"
+                  v-model="editableUiTheme[key]"
+                  class="color-picker-input"
+                />
+                <!-- Readonly text input to display and copy color value -->
+                <input
+                  v-if="typeof value === 'string' && (value.startsWith('#') || value.startsWith('rgb') || value.startsWith('hsl'))"
+                  type="text"
+                  :value="editableUiTheme[key]"
+                  readonly
+                  class="color-text-input text-input"
+                  @focus="handleFocusAndSelect"
+                />
+                <!-- Fallback for non-color values -->
+                <input
+                  v-else
+                  type="text"
+                  :id="`ui-${key}`"
+                  v-model="editableUiTheme[key]"
+                  class="text-input full-span-input"
+                />
+              </div>
             </div>
             <!-- UI Theme Textarea -->
             <hr style="margin-top: calc(var(--base-padding) * 2); margin-bottom: calc(var(--base-padding) * 2);">
@@ -920,21 +941,34 @@ watch(() => editingTheme.value?.themeData, (newThemeData) => {
                  <!-- 动态生成终端样式编辑控件 -->
               <div v-for="(value, key) in editingTheme.themeData" :key="key" class="form-group">
                 <label :for="`xterm-${key}`">{{ formatXtermLabel(key as keyof ITheme) }}:</label>
-                <!-- 简单判断是否为颜色值 -->
-                <input
-                  v-if="typeof value === 'string' && value.startsWith('#')"
-                  type="color"
-                  :id="`xterm-${key}`"
-                  v-model="(editingTheme.themeData as any)[key]"
-                />
-                <!-- 其他类型（如数字、布尔值）可以添加相应控件，这里简化为文本 -->
-                <input
-                  v-else
-                  type="text"
-                  :id="`xterm-${key}`"
-                  v-model="(editingTheme.themeData as any)[key]"
-                  class="text-input"
-                />
+                 <!-- Container for color picker and text display -->
+                <div class="color-input-group">
+                  <!-- Color Picker -->
+                  <input
+                    v-if="typeof value === 'string' && value.startsWith('#')"
+                    type="color"
+                    :id="`xterm-${key}`"
+                    v-model="(editingTheme.themeData as any)[key]"
+                    class="color-picker-input"
+                  />
+                  <!-- Readonly text input to display and copy color value -->
+                  <input
+                    v-if="typeof value === 'string' && value.startsWith('#')"
+                    type="text"
+                    :value="(editingTheme.themeData as any)[key]"
+                    readonly
+                    class="color-text-input text-input"
+                    @focus="handleFocusAndSelect"
+                  />
+                  <!-- Fallback for non-color values -->
+                  <input
+                    v-else
+                    type="text"
+                    :id="`xterm-${key}`"
+                    v-model="(editingTheme.themeData as any)[key]"
+                    class="text-input full-span-input"
+                  />
+                </div>
              </div>
               <!-- 显示解析错误（如果颜色选择器下方也需要的话） -->
               <!-- <p v-if="terminalThemeParseError" class="error-message full-width-group">{{ terminalThemeParseError }}</p> --> <!-- 错误消息统一显示在 Textarea 下方 -->
@@ -1218,14 +1252,32 @@ section[v-if*="isEditingTheme"] .form-group {
     box-sizing: border-box;
     transition: border-color 0.2s ease, box-shadow 0.2s ease; /* 添加过渡效果 */
 }
-.form-group input[type="color"] {
-    padding: 2px;
-    height: 34px;
-    min-width: 50px;
-    max-width: 70px;
-    justify-self: start;
-    border-radius: 4px; /* 保持圆角一致 */
+.color-input-group {
+    display: flex;
+    align-items: center;
+    gap: 0.5rem; /* Space between color picker and text input */
+    grid-column: 2 / 3; /* Ensure the group stays in the second column */
+    width: 100%; /* Take full width of the column */
 }
+.color-picker-input {
+    padding: 2px !important; /* Override general padding */
+    height: 34px !important; /* Match text input height */
+    min-width: 40px !important; /* Slightly smaller */
+    max-width: 50px !important;
+    border-radius: 4px !important;
+    border: 1px solid var(--border-color) !important; /* Add border */
+    flex-shrink: 0; /* Prevent shrinking */
+}
+.color-text-input {
+    flex-grow: 1; /* Allow text input to take remaining space */
+    min-width: 80px; /* Minimum width for text */
+    background-color: var(--header-bg-color) !important; /* Indicate readonly */
+    cursor: text; /* Allow text selection cursor */
+}
+.full-span-input {
+    grid-column: 1 / -1; /* Make non-color inputs span the whole group width */
+}
+
 .form-group input:focus, .form-group select:focus {
     border-color: var(--link-active-color);
     outline: 0;
diff --git a/packages/frontend/src/features/appearance/config/default-themes.ts b/packages/frontend/src/features/appearance/config/default-themes.ts
index af54e2c..8839094 100644
--- a/packages/frontend/src/features/appearance/config/default-themes.ts
+++ b/packages/frontend/src/features/appearance/config/default-themes.ts
@@ -35,6 +35,8 @@ export const defaultUiTheme: Record<string, string> = {
   '--link-color': '#333',
   '--link-hover-color': '#0056b3',
   '--link-active-color': '#007bff',
+  '--link-active-bg-color': '#e0e0ff', /* Added */
+  '--nav-item-active-bg-color': 'var(--link-active-bg-color)', /* Added */
   '--header-bg-color': '#f0f0f0',
   '--footer-bg-color': '#f0f0f0',
   '--button-bg-color': '#007bff',
@@ -47,6 +49,8 @@ export const defaultUiTheme: Record<string, string> = {
   '--split-line-hover-color': 'var(--border-color)', /* 分割线悬停颜色 */
   '--input-focus-border-color': 'var(--link-active-color)', /* 输入框聚焦边框颜色 */
   '--input-focus-glow': 'var(--link-active-color)', /* 输入框聚焦光晕值 */
+  '--ssh-tab-active': 'transparent', /* Added SSH Tab Active */
+  '--ssh-tab-background': 'transparent', /* Added SSH Tab Background */
   // End added variables
   '--font-family-sans-serif': 'sans-serif',
   '--base-padding': '1rem',
diff --git a/packages/frontend/src/style.css b/packages/frontend/src/style.css
index 466c4e2..4aa432a 100644
--- a/packages/frontend/src/style.css
+++ b/packages/frontend/src/style.css
@@ -3,15 +3,19 @@
 /* Tailwind Theme Variables Mapping */
 @theme inline {
   /* Base Colors */
-  --color-app: var(--app-bg-color);
-  --color-text-default: var(--text-color);
+  --color-background: var(--app-bg-color); /* More generic name */
+  --color-foreground: var(--text-color); /* More generic name */
+  --color-app: var(--app-bg-color); /* Keep specific if needed */
+  --color-text-default: var(--text-color); /* Keep specific if needed */
   --color-text-secondary: var(--text-color-secondary);
-  --color-border-default: var(--border-color);
+  --color-border: var(--border-color); /* Simplified name */
+  --color-border-default: var(--border-color); /* Keep specific if needed */
   --color-link: var(--link-color);
   --color-link-hover: var(--link-hover-color);
   --color-link-active: var(--link-active-color); /* Also used as primary/theme color */
   --color-primary: var(--link-active-color); /* Map primary to active link color */
   --color-link-active-bg: var(--link-active-bg-color); /* Map active link background */
+  --color-nav-active-bg: var(--nav-item-active-bg-color); /* Map specific nav active background */
 
   /* Component Colors */
   --color-header: var(--header-bg-color);
@@ -40,6 +44,7 @@
   --link-hover-color: #0056b3;   /* 链接悬停颜色 */
   --link-active-color: #007bff;   /* 激活链接/主题色 */
   --link-active-bg-color: #e0e0ff; /* 激活链接背景色 (类似 indigo-50) */
+  --nav-item-active-bg-color: var(--link-active-bg-color); /* 导航选中项背景色, 默认同激活链接背景 */
 
   /* 组件颜色 */
   --header-bg-color: #f0f0f0;     /* 头部背景色 */
@@ -53,8 +58,8 @@
   --split-line-hover-color: var(--border-color); /* 分割线悬停颜色 */
   --input-focus-border-color: var(--link-active-color); /* 输入框聚焦边框颜色 */
   --input-focus-glow: var(--link-active-color); /* 输入框聚焦光晕值 */
-  --ssh-tab-active: none；/* ssh标签激活状态颜色 */
-  --ssh-tab-background: none；/* ssh标签背景颜色 */
+  --ssh-tab-active: transparent; /* Corrected value */
+  --ssh-tab-background: transparent; /* Corrected value */
 
   /* 字体 */
   --font-family-sans-serif: sans-serif; /* 默认字体 */