fix(theming): Cut of the brightness into both directions if unknown

Signed-off-by: Joas Schilling <coding@schilljs.com>

1 files changed, 4 insertions, 4 deletions

diff --git a/apps/theming/lib/Util.php b/apps/theming/lib/Util.php
index f5321dada67..41ded251b0b 100644
--- a/apps/theming/lib/Util.php
+++ b/apps/theming/lib/Util.php
@@ -78,18 +78,18 @@ class Util {
 	 * get color for on-page elements:
 	 * theme color by default, grey if theme color is to bright
 	 * @param string $color
-	 * @param bool $brightBackground
+	 * @param ?bool $brightBackground
 	 * @return string
 	 */
-	public function elementColor($color, bool $brightBackground = true) {
+	public function elementColor($color, ?bool $brightBackground = null) {
 		$luminance = $this->calculateLuminance($color);
 
-		if ($brightBackground && $luminance > 0.8) {
+		if ($brightBackground !== false && $luminance > 0.8) {
 			// If the color is too bright in bright mode, we fall back to a darker gray
 			return '#aaaaaa';
 		}
 
-		if (!$brightBackground && $luminance < 0.2) {
+		if ($brightBackground !== true && $luminance < 0.2) {
 			// If the color is too dark in dark mode, we fall back to a brighter gray
 			return '#8c8c8c';
 		}