Editor, link checker:

- Add white outline for contrast on darker backgrounds.
- Change red colour in toolbar.

Props iseulde. Props rockwell15 for the initial patch.
See #36638.

git-svn-id: https://develop.svn.wordpress.org/trunk@37751 602fd350-edb4-49c9-b593-d223f7449a82

src/wp-includes/css/editor.css

@@ -1758,11 +1758,7 @@ div.wp-link-preview a {
 }
 
 div.wp-link-preview a.wplink-url-error {
-	color: #a00;
-}
-
-div.wp-link-preview a.wplink-url-error:hover {
-	color: #f00;
+	color: #dc3232;
 }
 
 div.wp-link-input {

src/wp-includes/js/tinymce/skins/wordpress/wp-content.css

@@ -212,6 +212,18 @@ a[data-wplink-url-error]:focus {
 	position: relative;
 }
 
+a[data-wplink-url-error]:before {
+	content: '';
+	display: block;
+	position: absolute;
+	top: -2px;
+	right: -2px;
+	bottom: -2px;
+	left: -2px;
+	outline: 2px dotted #fff;
+	z-index: -1;
+}
+
 /**
  * WP Views
  */