diff --git a/apps/federatedfilesharing/lib/Settings/Personal.php b/apps/federatedfilesharing/lib/Settings/Personal.php
index bd44e3d970bc4..18189f4cde7d5 100644
--- a/apps/federatedfilesharing/lib/Settings/Personal.php
+++ b/apps/federatedfilesharing/lib/Settings/Personal.php
@@ -1,4 +1,7 @@
 <?php
+
+declare(strict_types=1);
+
 /**
  * @copyright Copyright (c) 2017 Arthur Schiwon <blizzz@arthur-schiwon.de>
  *
@@ -29,7 +32,7 @@
 use OCA\FederatedFileSharing\FederatedShareProvider;
 use OCP\AppFramework\Http\TemplateResponse;
 use OCP\AppFramework\Services\IInitialState;
-use OCP\IL10N;
+use OCP\Defaults;
 use OCP\IUserSession;
 use OCP\IURLGenerator;
 use OCP\Settings\ISettings;
@@ -37,22 +40,19 @@
 class Personal implements ISettings {
 	private FederatedShareProvider $federatedShareProvider;
 	private IUserSession $userSession;
-	private IL10N $l;
-	private \OC_Defaults $defaults;
+	private Defaults $defaults;
 	private IInitialState $initialState;
 	private IURLGenerator $urlGenerator;
 
 	public function __construct(
-		FederatedShareProvider $federatedShareProvider, #
+		FederatedShareProvider $federatedShareProvider,
 		IUserSession $userSession,
-		IL10N $l,
-		\OC_Defaults $defaults,
+		Defaults $defaults,
 		IInitialState $initialState,
 		IURLGenerator $urlGenerator
 	) {
 		$this->federatedShareProvider = $federatedShareProvider;
 		$this->userSession = $userSession;
-		$this->l = $l;
 		$this->defaults = $defaults;
 		$this->initialState = $initialState;
 		$this->urlGenerator = $urlGenerator;
@@ -62,35 +62,25 @@ public function __construct(
 	 * @return TemplateResponse returns the instance with all parameters set, ready to be rendered
 	 * @since 9.1
 	 */
-	public function getForm() {
+	public function getForm(): TemplateResponse {
 		$cloudID = $this->userSession->getUser()->getCloudId();
 		$url = 'https://nextcloud.com/sharing#' . $cloudID;
 
-		$parameters = [
-			'message_with_URL' => $this->l->t('Share with me through my #Nextcloud Federated Cloud ID, see %s', [$url]),
-			'message_without_URL' => $this->l->t('Share with me through my #Nextcloud Federated Cloud ID', [$cloudID]),
-			'logoPath' => $this->defaults->getLogo(),
-			'reference' => $url,
-			'cloudId' => $cloudID,
-			'color' => $this->defaults->getColorPrimary(),
-			'textColor' => "#ffffff",
-		];
-
-		$this->initialState->provideInitialState('color', $this->defaults->getColorPrimary());
-		$this->initialState->provideInitialState('textColor', '#fffff');
+		$this->initialState->provideInitialState('color', $this->defaults->getDefaultColorPrimary());
+		$this->initialState->provideInitialState('textColor', $this->defaults->getDefaultTextColorPrimary());
 		$this->initialState->provideInitialState('logoPath', $this->defaults->getLogo());
 		$this->initialState->provideInitialState('reference', $url);
 		$this->initialState->provideInitialState('cloudId', $cloudID);
 		$this->initialState->provideInitialState('docUrlFederated', $this->urlGenerator->linkToDocs('user-sharing-federated'));
 
-		return new TemplateResponse('federatedfilesharing', 'settings-personal', $parameters, '');
+		return new TemplateResponse('federatedfilesharing', 'settings-personal', [], TemplateResponse::RENDER_AS_BLANK);
 	}
 
 	/**
 	 * @return string the section ID, e.g. 'sharing'
 	 * @since 9.1
 	 */
-	public function getSection() {
+	public function getSection(): ?string {
 		if ($this->federatedShareProvider->isIncomingServer2serverShareEnabled() ||
 			$this->federatedShareProvider->isIncomingServer2serverGroupShareEnabled()) {
 			return 'sharing';
@@ -106,7 +96,7 @@ public function getSection() {
 	 * E.g.: 70
 	 * @since 9.1
 	 */
-	public function getPriority() {
+	public function getPriority(): int {
 		return 40;
 	}
 }
diff --git a/apps/theming/lib/ThemingDefaults.php b/apps/theming/lib/ThemingDefaults.php
index afec58dc3a360..6cb204d1b1bcb 100644
--- a/apps/theming/lib/ThemingDefaults.php
+++ b/apps/theming/lib/ThemingDefaults.php
@@ -496,6 +496,15 @@ public function getTextColorPrimary() {
 		return $this->util->invertTextColor($this->getColorPrimary()) ? '#000000' : '#ffffff';
 	}
 
+	/**
+	 * Color of text in the header and primary buttons
+	 *
+	 * @return string
+	 */
+	public function getDefaultTextColorPrimary() {
+		return $this->util->invertTextColor($this->getDefaultColorPrimary()) ? '#000000' : '#ffffff';
+	}
+
 	/**
 	 * Has the admin disabled user customization
 	 */
diff --git a/lib/private/Mail/EMailTemplate.php b/lib/private/Mail/EMailTemplate.php
index 7ec2b46bad31b..40738623c192f 100644
--- a/lib/private/Mail/EMailTemplate.php
+++ b/lib/private/Mail/EMailTemplate.php
@@ -380,7 +380,7 @@ public function addHeader() {
 		$this->headerAdded = true;
 
 		$logoUrl = $this->urlGenerator->getAbsoluteURL($this->themingDefaults->getLogo(false));
-		$this->htmlBody .= vsprintf($this->header, [$this->themingDefaults->getColorPrimary(), $logoUrl, $this->themingDefaults->getName()]);
+		$this->htmlBody .= vsprintf($this->header, [$this->themingDefaults->getDefaultColorPrimary(), $logoUrl, $this->themingDefaults->getName()]);
 	}
 
 	/**
@@ -555,7 +555,7 @@ public function addBodyButtonGroup(string $textLeft,
 		$this->ensureBodyIsOpened();
 		$this->ensureBodyListClosed();
 
-		$color = $this->themingDefaults->getColorPrimary();
+		$color = $this->themingDefaults->getDefaultColorPrimary();
 		$textColor = $this->themingDefaults->getTextColorPrimary();
 
 		$this->htmlBody .= vsprintf($this->buttonGroup, [$color, $color, $urlLeft, $color, $textColor, $textColor, $textLeft, $urlRight, $textRight]);
@@ -586,7 +586,7 @@ public function addBodyButton(string $text, string $url, $plainText = '') {
 			$text = htmlspecialchars($text);
 		}
 
-		$color = $this->themingDefaults->getColorPrimary();
+		$color = $this->themingDefaults->getDefaultColorPrimary();
 		$textColor = $this->themingDefaults->getTextColorPrimary();
 		$this->htmlBody .= vsprintf($this->button, [$color, $color, $url, $color, $textColor, $textColor, $text]);
 
diff --git a/lib/public/Defaults.php b/lib/public/Defaults.php
index cb04d62df0d1a..a295db120ade4 100644
--- a/lib/public/Defaults.php
+++ b/lib/public/Defaults.php
@@ -205,6 +205,18 @@ public function getColorPrimary(): string {
 		return $this->defaults->getColorPrimary();
 	}
 
+	/**
+	 * Return the default color primary
+	 * @return string
+	 * @since 25.0.4
+	 */
+	public function getDefaultColorPrimary(): string {
+		if (method_exists($this->defaults, 'getDefaultColorPrimary')) {
+			return $this->defaults->getDefaultColorPrimary();
+		}
+		return $this->defaults->getColorPrimary();
+	}
+
 	/**
 	 * @param string $key
 	 * @return string URL to doc with key
@@ -231,4 +243,16 @@ public function getTitle(): string {
 	public function getTextColorPrimary(): string {
 		return $this->defaults->getTextColorPrimary();
 	}
+
+	/**
+	 * Returns primary color
+	 * @return string
+	 * @since 25.0.4
+	 */
+	public function getDefaultTextColorPrimary(): string {
+		if (method_exists($this->defaults, 'getDefaultTextColorPrimary')) {
+			return $this->defaults->getDefaultTextColorPrimary();
+		}
+		return $this->defaults->getTextColorPrimary();
+	}
 }
diff --git a/tests/lib/Mail/EMailTemplateTest.php b/tests/lib/Mail/EMailTemplateTest.php
index 74f440519884e..284c53e73b860 100644
--- a/tests/lib/Mail/EMailTemplateTest.php
+++ b/tests/lib/Mail/EMailTemplateTest.php
@@ -63,7 +63,7 @@ protected function setUp(): void {
 	public function testEMailTemplateCustomFooter() {
 		$this->defaults
 			->expects($this->any())
-			->method('getColorPrimary')
+			->method('getDefaultColorPrimary')
 			->willReturn('#0082c9');
 		$this->defaults
 			->expects($this->any())
@@ -104,7 +104,7 @@ public function testEMailTemplateCustomFooter() {
 	public function testEMailTemplateDefaultFooter() {
 		$this->defaults
 			->expects($this->any())
-			->method('getColorPrimary')
+			->method('getDefaultColorPrimary')
 			->willReturn('#0082c9');
 		$this->defaults
 			->expects($this->any())
@@ -147,7 +147,7 @@ public function testEMailTemplateDefaultFooter() {
 	public function testEMailTemplateSingleButton() {
 		$this->defaults
 			->expects($this->any())
-			->method('getColorPrimary')
+			->method('getDefaultColorPrimary')
 			->willReturn('#0082c9');
 		$this->defaults
 			->expects($this->any())
@@ -192,7 +192,7 @@ public function testEMailTemplateSingleButton() {
 	public function testEMailTemplateAlternativePlainTexts() {
 		$this->defaults
 			->expects($this->any())
-			->method('getColorPrimary')
+			->method('getDefaultColorPrimary')
 			->willReturn('#0082c9');
 		$this->defaults
 			->expects($this->any())