samples/SupportLeanbackShowcase/app/src/main/res/values/colors.xml

<resources>
    <color name="background_gradient_start">#FFFFFF</color>
    <color name="background_gradient_end">#DDDDDD</color>
    <color name="fastlane_background">#06838f</color>
    <color name="fastlane_teal_background">#00796B</color>
    <color name="search_opaque">#ffaa3f</color>
    <color name="search_color">#FFEB3B</color>
    <color name="search_bright_color">#FFEB3B</color>
    <color name="search_icon_color">#222222</color>
    <color name="accent">#80D3FB</color>
    <color name="settings_background">#00695C</color>

    <color name="default_background">#3d3d3d</color>

    <color name="default_card_background_color">#263238</color>
    <color name="default_card_footer_background_color">#37474F</color>
    <color name="selected_card_footer_background_color">#F0F</color>

    <color name="card_primary_text">#EEEEEE</color>
    <color name="card_secondary_text">#99EEEEEE</color>

    <color name="loading_error_card_background">#86c739</color>

    <color name="card_examples_background">#222222</color>

    <color name="detail_view_actionbar_background">#04549D</color>
    <color name="detail_view_background">#0374BF</color>
    <color name="detail_view_related_background">#022A4E</color>
</resources>