[Sony Cross-Device Development Themes and Apps] omikron20:
I don't have it. It's my colors.xml below. I change "background_dim_color" but is change background everywhere, not only under apps.

<?xml version="1.0" encoding="utf-8"?>
<resources>
<color name="abc_input_method_navigation_guard">@android:color/black</color>
<color name="abc_search_url_text_normal">#ff7fa87f</color>
<color name="abc_search_url_text_pressed">@android:color/black</color>
<color name="abc_search_url_text_selected">@android:color/black</color>
<color name="accent_material_dark">@color/material_deep_teal_200</color>
<color name="accent_material_light">@color/material_deep_teal_500</color>
<color name="actionbar_pressed_color">#33ffffff</color>
<color name="apptray_drawer_badge_text_color">@null</color>
<color name="apptray_drawer_text_color">@null</color>
<color name="apptray_drop_zone_text_color">#ffffffff</color>
<color name="apptray_drop_zone_text_shadow_color">#ff000000</color>
<color name="apptray_search_activity_hint_text_color">#50ffffff</color>
<color name="apptray_search_activity_suggestion_primary_color">#bb000000</color>
<color name="apptray_search_activity_text_color">#ffffffff</color>
<color name="apptray_text_color">@color/desktop_text_color</color>
<color name="apptray_text_shadow_color">@color/desktop_text_shadow_color</color>
<color name="background_dim_color">#99000000</color>
<color name="background_floating_material_dark">@color/material_grey_800</color>
<color name="background_floating_material_light">@android:color/white</color>
<color name="background_material_dark">@color/material_grey_850</color>
<color name="background_material_light">@color/material_grey_50</color>
<color name="bright_foreground_disabled_material_dark">#80ffffff</color>
<color name="bright_foreground_disabled_material_light">#80000000</color>
<color name="bright_foreground_inverse_material_dark">@color/bright_foreground_material_light</color>
<color name="bright_foreground_inverse_material_light">@color/bright_foreground_material_dark</color>
<color name="bright_foreground_material_dark">@android:color/white</color>
<color name="bright_foreground_material_light">@android:color/black</color>
<color name="button_material_dark">#ff5a595b</color>
<color name="button_material_light">#ffd6d7d7</color>
<color name="common_action_bar_splitter">#ffd2d2d2</color>
<color name="common_signin_btn_dark_text_default">@android:color/white</color>
<color name="common_signin_btn_dark_text_disabled">#ffaaaaaa</color>
<color name="common_signin_btn_dark_text_focused">@android:color/white</color>
<color name="common_signin_btn_dark_text_pressed">@android:color/white</color>
<color name="common_signin_btn_default_background">#ffdd4b39</color>
<color name="common_signin_btn_light_text_default">#ff737373</color>
<color name="common_signin_btn_light_text_disabled">#ffaaaaaa</color>
<color name="common_signin_btn_light_text_focused">#ff737373</color>
<color name="common_signin_btn_light_text_pressed">@android:color/white</color>
<color name="cui_grid_divider_color">#30ffffff</color>
<color name="delete_dropzone_text_color">#ffffffff</color>
<color name="delete_dropzone_text_shadow_color">#ff000000</color>
<color name="design_fab_shadow_end_color">@android:color/transparent</color>
<color name="design_fab_shadow_mid_color">#14000000</color>
<color name="design_fab_shadow_start_color">#44000000</color>
<color name="design_fab_stroke_end_inner_color">#0a000000</color>
<color name="design_fab_stroke_end_outer_color">#0f000000</color>
<color name="design_fab_stroke_top_inner_color">#1affffff</color>
<color name="design_fab_stroke_top_outer_color">#2effffff</color>
<color name="design_snackbar_background_color">#ff323232</color>
<color name="design_textinput_error_color">#ffdd2c00</color>
<color name="desktop_text_color">#ff000000</color>
<color name="desktop_text_shadow_color">#b0000000</color>
<color name="desktop_tip_info_text_color">#ff000000</color>
<color name="desktop_tip_title_text_color">#ff40a7ff</color>
<color name="dim_foreground_disabled_material_dark">#80bebebe</color>
<color name="dim_foreground_disabled_material_light">#80323232</color>
<color name="dim_foreground_material_dark">#ffbebebe</color>
<color name="dim_foreground_material_light">#ff323232</color>
<color name="drop_hint_color">#ffffffff</color>
<color name="foreground_material_dark">@android:color/white</color>
<color name="foreground_material_light">@android:color/black</color>
<color name="highlighted_text_material_dark">#6680cbc4</color>
<color name="highlighted_text_material_light">#66009688</color>
<color name="hint_foreground_material_dark">@color/bright_foreground_disabled_material_dark</color>
<color name="hint_foreground_material_light">@color/bright_foreground_disabled_material_light</color>
<color name="home_badge_text_color">#ffa86600</color>
<color name="material_blue_grey_800">#ff37474f</color>
<color name="material_blue_grey_900">#ff263238</color>
<color name="material_blue_grey_950">#ff21272b</color>
<color name="material_deep_teal_200">#ff80cbc4</color>
<color name="material_deep_teal_500">#ff009688</color>
<color name="material_grey_100">#fff5f5f5</color>
<color name="material_grey_300">#ffe0e0e0</color>
<color name="material_grey_50">#fffafafa</color>
<color name="material_grey_600">#ff757575</color>
<color name="material_grey_800">#ff424242</color>
<color name="material_grey_850">#ff303030</color>
<color name="material_grey_900">#ff212121</color>
<color name="open_folder_header_text_color">#ff4c4c4c</color>
<color name="open_folder_item_text_color">#ff4c4c4c</color>
<color name="open_folder_item_text_color_old">#ffffffff</color>
<color name="primary_dark_material_dark">@android:color/black</color>
<color name="primary_dark_material_light">@color/material_grey_600</color>
<color name="primary_material_dark">@color/material_grey_900</color>
<color name="primary_material_light">@color/material_grey_100</color>
<color name="primary_text_default_material_dark">#ffffffff</color>
<color name="primary_text_default_material_light">#de000000</color>
<color name="primary_text_disabled_material_dark">#4dffffff</color>
<color name="primary_text_disabled_material_light">#39000000</color>
<color name="ripple_material_dark">#42ffffff</color>
<color name="ripple_material_light">#1f000000</color>
<color name="search_activity_background_dim_color">@color/background_dim_color</color>
<color name="search_activity_hint_text_color">#50ffffff</color>
<color name="search_activity_text_color">#ffffffff</color>
<color name="search_suggestion_item_text_color">#ffffffff</color>
<color name="search_suggestion_item_text_shadow_color">#b0000000</color>
<color name="secondary_text_default_material_dark">#b3ffffff</color>
<color name="secondary_text_default_material_light">#8a000000</color>
<color name="secondary_text_disabled_material_dark">#36ffffff</color>
<color name="secondary_text_disabled_material_light">#24000000</color>
<color name="stage_text_color">@color/desktop_text_color</color>
<color name="stage_text_shadow_color">@color/desktop_text_shadow_color</color>
<color name="switch_thumb_disabled_material_dark">#ff616161</color>
<color name="switch_thumb_disabled_material_light">#ffbdbdbd</color>
<color name="switch_thumb_normal_material_dark">#ffbdbdbd</color>
<color name="switch_thumb_normal_material_light">#fff1f1f1</color>
<color name="tutorial_background_color">#ca0d0d0d</color>
<item type="color" name="common_signin_btn_text_dark">false</item>
<item type="color" name="common_signin_btn_text_light">false</item>
</resources>