chrome/browser/resources/app_list/start_page.css

/* Copyright 2013 The Chromium Authors. All rights reserved.
 * Use of this source code is governed by a BSD-style license that can be
 * found in the LICENSE file. */

html,
body,
#start-page {
  background-color: rgb(250, 250, 250);
  height: 100%;
  margin: 0;
  overflow: hidden;
  padding: 0;
  width: 100%;
}

#start-page {
  -webkit-align-items: stretch;
  -webkit-flex-direction: column;
  -webkit-justify-content: flex-start;
  -webkit-user-select: none;
  box-sizing: border-box;
  display: -webkit-flex;
  padding: 10px;
}

#logo {
  background-image: -webkit-image-set(
    url('chrome://theme/IDR_LOCAL_NTP_IMAGES_LOGO_PNG') 1x,
    url('chrome://theme/IDR_LOCAL_NTP_IMAGES_LOGO_PNG@2x') 2x);
  height: 95px;
  margin: auto;
  width: 269px;
}

<include src="recommended_apps.css">