diff --git a/settings/appearance/color.go b/settings/appearance/color.go
index 8a7cc6d..5b12d8b 100644
--- a/settings/appearance/color.go
+++ b/settings/appearance/color.go
@@ -27,7 +27,7 @@ func GetColorScheme() (ColorScheme, error) {
 	}
 
 	result := value.(uint32)
-	if result > 2 {
+	if result > 2 || result > 255 {
 		result = 0 // Unknown values should be treated as 0 (no preference).
 	}
 
diff --git a/settings/appearance/contrast.go b/settings/appearance/contrast.go
index 0cf900a..e8e0652 100644
--- a/settings/appearance/contrast.go
+++ b/settings/appearance/contrast.go
@@ -18,7 +18,7 @@ func GetContrast() (Contrast, error) {
 	}
 
 	result := value.(uint32)
-	if result > 1 {
+	if result > 1 || result > 255 {
 		result = 0 // Unknown values should be treated as 0 (no preference).
 	}