update：更新首页组件样式

src/components/app-full-scren/app-full-scren.vue

 <template>
     <div class="fullscren">
-        <Icon :type="fullScren == true ? 'ios-contract' : 'ios-expand'" color="#aaa" size="22" @click="handleScreen"/>
+        <Icon :type="fullScren == true ? 'ios-contract' : 'ios-expand'" size="22" @click="handleScreen"/>
     </div>
 </template>
 <script lang = 'ts'>

src/components/app-lock-scren/app-lock-scren.vue

 <template>
     <div class="lockscren">
         <span>
-            <Icon type="md-lock" size="22" color="#aaa" @click="handleLock"/>
+            <Icon type="md-lock" size="22" @click="handleLock"/>
             <el-dialog :title="this.$t('components.lockScren.title')"
                 :visible.sync="box"
                 width="30%"

src/components/app-message-popover/app-message-popover.scss

@@ -19,7 +19,6 @@
   font-size: 19px;
   padding-top: 2px;
   padding-right: 2px;
-  color: #aaa;
   cursor: pointer;
 }
 

src/components/app-theme/app-theme.vue

@@ -5,9 +5,7 @@
             popper-class='app-app-theme'
             placement='bottom-end'
             :width="Object.is($i18n.locale, 'zh-CN') ? 180 : 250">
-            <a>
-                <icon class='app-theme-icon' type='md-settings' :size="22" />
-            </a>
+            <icon class='app-theme-icon' type='md-settings' :size="22" />
             <template slot='content'>
                 <div class='app-theme-color'>
                     <template v-for="(theme, index) in defaultThemes">