diff --git a/src/Core/Theme.php b/src/Core/Theme.php
index ff3265c90a..f7dce3c298 100644
--- a/src/Core/Theme.php
+++ b/src/Core/Theme.php
@@ -257,4 +257,56 @@ class Theme
 
 		return 'view/theme/' . $theme . '/style.pcss' . (!empty($query_params) ? '?' . http_build_query($query_params) : '');
 	}
+
+	/**
+	 * Returns the background color of the provided theme if available.
+	 *
+	 * @param string   $theme
+	 * @param int|null $uid   Current logged-in user id
+	 * @return string|null
+	 */
+	public static function getBackgroundColor(string $theme, $uid = null)
+	{
+		$theme = Strings::sanitizeFilePathItem($theme);
+
+		$return = null;
+
+		// silently fail if theme was removed or if $theme is funky
+		if (file_exists("view/theme/$theme/theme.php")) {
+			include_once "view/theme/$theme/theme.php";
+
+			$func = "{$theme}_get_background_color";
+			if (function_exists($func)) {
+				$return = $func($uid);
+			}
+		}
+
+		return $return;
+	}
+
+	/**
+	 * Returns the theme color of the provided theme if available.
+	 *
+	 * @param string   $theme
+	 * @param int|null $uid   Current logged-in user id
+	 * @return string|null
+	 */
+	public static function getThemeColor(string $theme, int $uid = null)
+	{
+		$theme = Strings::sanitizeFilePathItem($theme);
+
+		$return = null;
+
+		// silently fail if theme was removed or if $theme is funky
+		if (file_exists("view/theme/$theme/theme.php")) {
+			include_once "view/theme/$theme/theme.php";
+
+			$func = "{$theme}_get_theme_color";
+			if (function_exists($func)) {
+				$return = $func($uid);
+			}
+		}
+
+		return $return;
+	}
 }
diff --git a/view/theme/duepuntozero/theme.php b/view/theme/duepuntozero/theme.php
index 33ad00baff..10427df6f0 100644
--- a/view/theme/duepuntozero/theme.php
+++ b/view/theme/duepuntozero/theme.php
@@ -98,3 +98,25 @@ $(document).ready(function() {
 </script>
 EOT;
 }
+
+/**
+ * @param int|null $uid
+ * @return null
+ * @see \Friendica\Core\Theme::getBackgroundColor()
+ * @TODO Implement this function
+ */
+function duepuntozero_get_background_color(int $uid = null)
+{
+	return null;
+}
+
+/**
+ * @param int|null $uid
+ * @return null
+ * @see \Friendica\Core\Theme::getThemeColor()
+ * @TODO Implement this function
+ */
+function duepuntozero_get_theme_color(int $uid = null)
+{
+	return null;
+}
diff --git a/view/theme/frio/theme.php b/view/theme/frio/theme.php
index f256bec695..daeb22a5ed 100644
--- a/view/theme/frio/theme.php
+++ b/view/theme/frio/theme.php
@@ -366,3 +366,51 @@ function frio_display_item(App $a, &$arr)
 	}
 	$arr['output']['subthread'] = $subthread;
 }
+
+/**
+ * @param int|null $uid
+ * @return string
+ * @see \Friendica\Core\Theme::getBackgroundColor()
+ */
+function frio_get_background_color(int $uid = null)
+{
+	$background_color = DI::config()->get('frio', 'background_color') ?: '#ededed';
+
+	if ($uid) {
+		$background_color = DI::pConfig()->get($uid, 'frio', 'background_color') ?: $background_color;
+	}
+
+	$scheme = DI::config()->get('frio', 'scheme', DI::config()->get('frio', 'schema'));
+	$scheme = Strings::sanitizeFilePathItem($scheme);
+
+	if ($scheme && ($scheme != '---') && file_exists('view/theme/frio/scheme/' . $scheme . '.php')) {
+		$schemefile = 'view/theme/frio/scheme/' . $scheme . '.php';
+		require_once $schemefile;
+	}
+
+	return $background_color;
+}
+
+/**
+ * @param int|null $uid
+ * @return string
+ * @see \Friendica\Core\Theme::getThemeColor()
+ */
+function frio_get_theme_color(int $uid = null)
+{
+	$nav_bg = DI::config()->get('frio', 'nav_bg') ?: '#708fa0';
+
+	if ($uid) {
+		$nav_bg = DI::pConfig()->get($uid, 'frio', 'background_color') ?: $nav_bg;
+	}
+
+	$scheme = DI::config()->get('frio', 'scheme', DI::config()->get('frio', 'schema'));
+	$scheme = Strings::sanitizeFilePathItem($scheme);
+
+	if ($scheme && ($scheme != '---') && file_exists('view/theme/frio/scheme/' . $scheme . '.php')) {
+		$schemefile = 'view/theme/frio/scheme/' . $scheme . '.php';
+		require_once $schemefile;
+	}
+
+	return $nav_bg;
+}
diff --git a/view/theme/quattro/theme.php b/view/theme/quattro/theme.php
index d54517de71..3ff9302c85 100644
--- a/view/theme/quattro/theme.php
+++ b/view/theme/quattro/theme.php
@@ -14,3 +14,25 @@ function quattro_init(App $a) {
 	DI::page()['htmlhead'] .= '<script src="'.DI::baseUrl().'/view/theme/quattro/tinycon.min.js"></script>';
 	DI::page()['htmlhead'] .= '<script src="'.DI::baseUrl().'/view/theme/quattro/js/quattro.js"></script>';;
 }
+
+/**
+ * @param int|null $uid
+ * @return null
+ * @see \Friendica\Core\Theme::getBackgroundColor()
+ * @TODO Implement this function
+ */
+function quattro_get_background_color(int $uid = null)
+{
+	return null;
+}
+
+/**
+ * @param int|null $uid
+ * @return null
+ * @see \Friendica\Core\Theme::getThemeColor()
+ * @TODO Implement this function
+ */
+function quattro_get_theme_color(int $uid = null)
+{
+	return null;
+}
diff --git a/view/theme/smoothly/theme.php b/view/theme/smoothly/theme.php
index e6f40749f9..e20e9003f9 100644
--- a/view/theme/smoothly/theme.php
+++ b/view/theme/smoothly/theme.php
@@ -93,3 +93,25 @@ if (! function_exists('_js_in_foot')) {
 		return DI::page()['bottom'] = Renderer::replaceMacros($tpl, $bottom);
 	}
 }
+
+/**
+ * @param int|null $uid
+ * @return null
+ * @see \Friendica\Core\Theme::getBackgroundColor()
+ * @TODO Implement this function
+ */
+function smoothly_get_background_color(int $uid = null)
+{
+	return null;
+}
+
+/**
+ * @param int|null $uid
+ * @return null
+ * @see \Friendica\Core\Theme::getThemeColor()
+ * @TODO Implement this function
+ */
+function smoothly_get_theme_color(int $uid = null)
+{
+	return null;
+}
diff --git a/view/theme/vier/theme.php b/view/theme/vier/theme.php
index e5d5e1ce97..fcbb148dc7 100644
--- a/view/theme/vier/theme.php
+++ b/view/theme/vier/theme.php
@@ -364,3 +364,25 @@ function vier_community_info()
 	$tpl = Renderer::getMarkupTemplate('communityhome.tpl');
 	DI::page()['right_aside'] = Renderer::replaceMacros($tpl, $aside);
 }
+
+/**
+ * @param int|null $uid
+ * @return null
+ * @see \Friendica\Core\Theme::getBackgroundColor()
+ * @TODO Implement this function
+ */
+function vier_get_background_color(int $uid = null)
+{
+	return null;
+}
+
+/**
+ * @param int|null $uid
+ * @return null
+ * @see \Friendica\Core\Theme::getThemeColor()
+ * @TODO Implement this function
+ */
+function vier_get_theme_color(int $uid = null)
+{
+	return null;
+}