diff --git a/phpBB/styles/prosilver/theme/colours.css b/phpBB/styles/prosilver/theme/colours.css
index 8ea41ef95f..a5a52fbe97 100644
--- a/phpBB/styles/prosilver/theme/colours.css
+++ b/phpBB/styles/prosilver/theme/colours.css
@@ -977,19 +977,11 @@ fieldset.quick-login input.inputbox {
 	color: #333333;
 }
 
-#message-box textarea.drag-n-drop {
-	-webkit-outline-color: rgba(102, 102, 102, 0.5);
-	-moz-outline-color: rgba(102, 102, 102, 0.5);
-	-ms-outline-color: rgba(102, 102, 102, 0.5);
-	-o-outline-color: rgba(102, 102, 102, 0.5);
+.drag-n-drop {
 	outline-color: rgba(102, 102, 102, 0.5);
 }
 
-#message-box textarea.drag-n-drop-highlight {
-	-webkit-outline-color: rgba(17, 163, 234, 0.5);
-	-moz-outline-color: rgba(17, 163, 234, 0.5);
-	-ms-outline-color: rgba(17, 163, 234, 0.5);
-	-o-outline-color: rgba(17, 163, 234, 0.5);
+.drag-n-drop-highlight {
 	outline-color: rgba(17, 163, 234, 0.5);
 }
 
diff --git a/phpBB/styles/prosilver/theme/forms.css b/phpBB/styles/prosilver/theme/forms.css
index ed2c253cf1..777f011c35 100644
--- a/phpBB/styles/prosilver/theme/forms.css
+++ b/phpBB/styles/prosilver/theme/forms.css
@@ -243,15 +243,7 @@ fieldset.submit-buttons input {
 	max-width: 100%;
 	font-size: 1.2em;
 	resize: vertical;
-	-webkit-outline: 3px dashed transparent;
-	-moz-outline: 3px dashed transparent;
-	-ms-outline: 3px dashed transparent;
-	-o-outline: 3px dashed transparent;
 	outline: 3px dashed transparent;
-	-webkit-outline-offset: -4px;
-	-moz-outline-offset: -4px;
-	-ms-outline-offset: -4px;
-	-o-outline-offset: -4px;
 	outline-offset: -4px;
 	-webkit-transition: all .5s ease;
 	-moz-transition: all .5s ease;