我正在使用 Polymer Starter kit 我正在尝试更改 paper-scroll-header-panel 的默认颜色，但它不会。
根据paper-scroll-header-panel：
更改工具栏全尺寸时的背景
--paper-scroll-header-panel-full-header
压缩工具栏时更改工具栏的背景
--paper-scroll-header-panel-condensed-header
在 Polymer Starter Kit 的共享样式中，我添加了
paper-scroll-header-panel {
/* background for toolbar when it is at its full size */
--paper-scroll-header-panel-full-header: {
background-color: #777777;
};
/* background for toolbar when it is condensed */
--paper-scroll-header-panel-condensed-header: {
background-color: #777777;
};
}
但是什么也没发生，我是错过了什么还是做错了什么？任何帮助将不胜感激。
elements.html 的代码
<!-- Iron elements -->
<link rel="import" href="../bower_components/iron-flex-layout/iron-flex-layout.html">
<link rel="import" href="../bower_components/iron-icons/iron-icons.html">
<link rel="import" href="../bower_components/iron-pages/iron-pages.html">
<link rel="import" href="../bower_components/iron-selector/iron-selector.html">
<!-- Paper elements -->
<link rel="import" href="../bower_components/paper-drawer-panel/paper-drawer-panel.html">
<link rel="import" href="../bower_components/paper-icon-button/paper-icon-button.html">
<link rel="import" href="../bower_components/paper-item/paper-item.html">
<link rel="import" href="../bower_components/paper-material/paper-material.html">
<link rel="import" href="../bower_components/paper-menu/paper-menu.html">
<link rel="import" href="../bower_components/paper-scroll-header-panel/paper-scroll-header-panel.html">
<link rel="import" href="../bower_components/paper-styles/typography.html">
<link rel="import" href="../bower_components/paper-toast/paper-toast.html">
<link rel="import" href="../bower_components/paper-toolbar/paper-toolbar.html">
<!-- Uncomment next block to enable Service Worker Support (2/2) -->
<!--
<link rel="import" href="../bower_components/platinum-sw/platinum-sw-cache.html">
<link rel="import" href="../bower_components/platinum-sw/platinum-sw-register.html">
-->
<!-- Configure your routes here -->
<link rel="import" href="routing.html">
<!-- Add your elements here -->
<link rel="import" href="../styles/app-theme.html">
<link rel="import" href="../styles/shared-styles.html">
<link rel="import" href="my-greeting/my-greeting.html">
<link rel="import" href="my-list/my-list.html">
shared-styles.html 的代码
<link rel="import" href="../bower_components/polymer/polymer.html">
<link rel="import" href="../bower_components/paper-styles/typography.html">
<link rel="import" href="../bower_components/paper-styles/color.html">
<!-- shared styles for all elements and index.html -->
<dom-module id="shared-styles">
<template>
<style>
.page-title {
@apply(--paper-font-display2);
}
.app-menu {
--paper-menu-selected-item: {
color: #fff;
background: var(--light-primary-color);
}
}
paper-menu a > *, paper-menu paper-item > *, paper-menu paper-icon-item > * {
pointer-events: none;
}
@media (max-width: 600px) {
.page-title {
font-size: 24px!important;
}
}
paper-scroll-header-panel {
/* background for toolbar when it is at its full size */
--paper-scroll-header-panel-full-header: {
background-color: #777777;
};
/* background for toolbar when it is condensed */
--paper-scroll-header-panel-condensed-header: {
background-color: #777777;
};
}
</style>
</template>
</dom-module>
index.html 的代码
<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta name="description" content="">
<meta name="viewport" content="width=device-width, initial-scale=1">
<meta name="generator" content="Polymer Starter Kit">
<title>Polymer Starter Kit</title>
<!-- Place favicon.ico in the `app/` directory -->
<!-- Chrome for Android theme color -->
<meta name="theme-color" content="#2E3AA1">
<!-- Web Application Manifest -->
<link rel="manifest" href="manifest.json">
<!-- Tile color for Win8 -->
<meta name="msapplication-TileColor" content="#3372DF">
<!-- Add to homescreen for Chrome on Android -->
<meta name="mobile-web-app-capable" content="yes">
<meta name="application-name" content="PSK">
<link rel="icon" sizes="192x192" href="images/touch/chrome-touch-icon-192x192.png">
<!-- Add to homescreen for Safari on iOS -->
<meta name="apple-mobile-web-app-capable" content="yes">
<meta name="apple-mobile-web-app-status-bar-style" content="black">
<meta name="apple-mobile-web-app-title" content="Polymer Starter Kit">
<link rel="apple-touch-icon" href="images/touch/apple-touch-icon.png">
<!-- Tile icon for Win8 (144x144) -->
<meta name="msapplication-TileImage" content="images/touch/ms-touch-icon-144x144-precomposed.png">
<!-- build:css styles/main.css -->
<link rel="stylesheet" href="styles/main.css">
<!-- endbuild-->
<!-- build:js bower_components/webcomponentsjs/webcomponents-lite.min.js -->
<script src="bower_components/webcomponentsjs/webcomponents-lite.js"></script>
<!-- endbuild -->
<!-- Because this project uses vulcanize this should be your only html import
in this file. All other imports should go in elements.html -->
<link rel="import" href="elements/elements.html">
<!-- For shared styles, shared-styles.html import in elements.html -->
<style is="custom-style" include="shared-styles"></style>
</head>
<body unresolved>
<!-- build:remove -->
<span id="browser-sync-binding"></span>
<!-- endbuild -->
<template is="dom-bind" id="app">
<paper-drawer-panel id="paperDrawerPanel">
<!-- Drawer Scroll Header Panel -->
<paper-scroll-header-panel drawer fixed>
<!-- Drawer Toolbar -->
<paper-toolbar id="drawerToolbar">
<span class="menu-name">Ariel Magbanua</span>
</paper-toolbar>
<!-- Drawer Content -->
<paper-menu class="app-menu" attr-for-selected="data-route" selected="[[route]]">
<a data-route="home" href="{{baseUrl}}">
<iron-icon icon="home"></iron-icon>
<span>Home</span>
</a>
<a data-route="users" href="{{baseUrl}}users">
<iron-icon icon="info"></iron-icon>
<span>Users</span>
</a>
<a data-route="contact" href="{{baseUrl}}contact">
<iron-icon icon="mail"></iron-icon>
<span>Contact</span>
</a>
</paper-menu>
</paper-scroll-header-panel>
<!-- Main Area -->
<paper-scroll-header-panel main id="headerPanelMain" condenses keep-condensed-header>
<!-- Main Toolbar -->
<paper-toolbar id="mainToolbar" class="tall">
<paper-icon-button id="paperToggle" icon="menu" paper-drawer-toggle></paper-icon-button>
<span class="space"></span>
<!-- Toolbar icons -->
<paper-icon-button icon="refresh"></paper-icon-button>
<paper-icon-button icon="search"></paper-icon-button>
<!-- Application name -->
<div class="middle middle-container">
<div class="app-name">Polymer Starter Kit</div>
</div>
<!-- Application sub title -->
<div class="bottom bottom-container">
<div class="bottom-title">The future of the web today</div>
</div>
</paper-toolbar>
<!-- Main Content -->
<div class="content">
<iron-pages attr-for-selected="data-route" selected="{{route}}">
<section data-route="home" tabindex="-1">
<paper-material elevation="1">
<my-greeting></my-greeting>
<p class="subhead">You now have:</p>
<my-list></my-list>
<p>Looking for more Web App layouts? Check out our <a href="https://github.com/PolymerElements/app-layout-templates">layouts</a> collection. You can also <a href="http://polymerelements.github.io/app-layout-templates/">preview</a> them live.</p>
</paper-material>
<paper-material elevation="1">
<p>This is another card.</p>
</paper-material>
<paper-material elevation="1">
<h2 id="license">License</h2>
<p>Everything in this repo is BSD style license unless otherwise specified.</p>
<p>Copyright (c) 2015 The Polymer Authors. All rights reserved.</p>
<p>Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:</p>
<ul>
<li>Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.</li>
<li>Redistributions in binary form must reproduce the above
copyright notice, this list of conditions and the following disclaimer
in the documentation and/or other materials provided with the
distribution.</li>
<li>Neither the name of Google Inc. nor the names of its
contributors may be used to endorse or promote products derived from
this software without specific prior written permission.</li>
</ul>
<p>THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.</p>
</paper-material>
</section>
<section data-route="users" tabindex="-1">
<paper-material elevation="1">
<h1 class="page-title" tabindex="-1">Users</h1>
<p>This is the users section</p>
<a href$="{{baseUrl}}users/Addy">Addy</a><br>
<a href$="{{baseUrl}}users/Rob">Rob</a><br>
<a href$="{{baseUrl}}users/Chuck">Chuck</a><br>
<a href$="{{baseUrl}}users/Sam">Sam</a>
</paper-material>
</section>
<section data-route="user-info" tabindex="-1">
<paper-material elevation="-1">
<h1 class="page-title" tabindex="-1">User: {{params.name}}</h1>
<div>This is {{params.name}}'s section</div>
</paper-material>
</section>
<section data-route="contact" tabindex="-1">
<paper-material elevation="1">
<h1 class="page-title" tabindex="-1">Contact</h1>
<p>This is the contact section</p>
</paper-material>
</section>
</iron-pages>
</div>
</paper-scroll-header-panel>
</paper-drawer-panel>
<paper-toast id="toast">
<span class="toast-hide-button" role="button" tabindex="0" onclick="app.$.toast.hide()">Ok</span>
</paper-toast>
<!-- Uncomment next block to enable Service Worker support (1/2) -->
<!--
<paper-toast id="caching-complete"
duration="6000"
text="Caching complete! This app will work offline.">
</paper-toast>
<platinum-sw-register auto-register
clients-claim
skip-waiting
base-uri="bower_components/platinum-sw/bootstrap"
on-service-worker-installed="displayInstalledToast">
<platinum-sw-cache default-cache-strategy="fastest"
cache-config-file="cache-config.json">
</platinum-sw-cache>
</platinum-sw-register>
-->
</template>
<!-- build:js scripts/app.js -->
<script src="scripts/app.js"></script>
<!-- endbuild-->
</body>
</html>