Issue 3769 - UI colours gone bad

mobile/android/base/resources/values/dimens.xml

 <?xml version="1.0" encoding="utf-8"?>
 <!-- This Source Code Form is subject to the terms of the Mozilla Public
    - License, v. 2.0. If a copy of the MPL was not distributed with this
    - file, You can obtain one at http://mozilla.org/MPL/2.0/. -->
 
 <resources>
 
     <dimen name="standard_corner_radius">4dp</dimen>
 
     <dimen name="autocomplete_min_width">200dp</dimen>
     <dimen name="autocomplete_row_height">32dp</dimen>
 
     <dimen name="browser_toolbar_height">48dp</dimen>
     <!-- This value is the height of the Tabs Panel header view
          (browser_toolbar_height) minus the height of the indicator
          (6dp). This value should change when the height of the view changes. -->
     <dimen name="tabs_panel_indicator_selected_padding_top">42dp</dimen>
 
     <!-- We use two different values for browser_toolbar_height on tablet
          which is inconsistent. Temporary value until bug 1150730 is fixed. -->
     <dimen name="browser_toolbar_height_flipper">48dp</dimen>
     <dimen name="browser_toolbar_button_padding">12dp</dimen>
     <dimen name="browser_toolbar_icon_width">48dp</dimen>
     <dimen name="browser_toolbar_menu_icon_height">16dp</dimen>
 
     <!-- favicon_size includes 4dp of right padding. We can't use margin (which would allow us to
          specify the actual size) because that would decrease the size of our hit target. -->
     <dimen name="browser_toolbar_favicon_size">21.33dip</dimen>
-    <dimen name="browser_toolbar_shadow_size">2dp</dimen>
+    <!-- Using ABB dimension from style guide. See https://issues.adblockplus.org/ticket/3769 -->
+    <dimen name="browser_toolbar_shadow_size">@dimen/abb_browser_toolbar_divider</dimen>
 
     <!-- If you update one of these values, update the others. -->
     <dimen name="tablet_nav_button_width">42dp</dimen>
     <dimen name="tablet_nav_button_width_half">21dp</dimen>
     <dimen name="tablet_nav_button_width_plus_half">63dp</dimen>
 
     <!-- This is the system default for the vertical padding for the divider of the TabWidget.
          Used to mimic the divider padding on the tablet tabs panel back button. -->
     <dimen name="tab_panel_divider_vertical_padding">12dp</dimen>
 
@@ skipping 177 matching lines @@
 
     <!-- http://blog.danlew.net/2015/01/06/handling-android-resources-with-non-standard-formats/ -->
     <item name="match_parent" type="dimen">-1</item>
     <item name="wrap_content" type="dimen">-2</item>
 
     <item name="tab_strip_content_start" type="dimen">12dp</item>
 
     <item name="split_plane_left_pane_weight" format="float" type="dimen">0.32</item>
     <item name="split_plane_right_pane_weight" format="float" type="dimen">0.68</item>
 </resources>