diff --git a/src/wp-admin/css/about.css b/src/wp-admin/css/about.css
index b783a67aef..19359e58c9 100644
--- a/src/wp-admin/css/about.css
+++ b/src/wp-admin/css/about.css
@@ -164,7 +164,7 @@
 
 .about-wrap .point-releases {
 	margin-top: 5px;
-	border-bottom: 1px solid #dfdfdf;
+	border-bottom: 1px solid #ddd;
 }
 
 .about-wrap .changelog.point-releases h3 {
diff --git a/src/wp-admin/css/color-picker.css b/src/wp-admin/css/color-picker.css
index 0ce28adfd8..50edbdadf5 100644
--- a/src/wp-admin/css/color-picker.css
+++ b/src/wp-admin/css/color-picker.css
@@ -94,7 +94,7 @@
 .wp-picker-container .iris-picker {
 	-webkit-border-radius: 0;
 	border-radius: 0;
-	border-color: #dfdfdf;
+	border-color: #ddd;
 	margin-top: 6px;
 }
 
diff --git a/src/wp-admin/css/common.css b/src/wp-admin/css/common.css
index d12040cc7f..804f98cd27 100644
--- a/src/wp-admin/css/common.css
+++ b/src/wp-admin/css/common.css
@@ -2013,7 +2013,7 @@ html.wp-toolbar {
 	font-size: 14px;
 	line-height: 24px;
 	font-weight: 600;
-	background: #e4e4e4;
+	background: #e5e5e5;
 	color: #555;
 	text-decoration: none;
 	white-space: nowrap;
@@ -2029,7 +2029,7 @@ h3 .nav-tab, /* Back-compat for pre-4.4 */
 .nav-tab:hover,
 .nav-tab:focus {
 	background-color: #fff;
-	color: #464646;
+	color: #444;
 }
 
 .nav-tab-active,
@@ -2040,7 +2040,7 @@ h3 .nav-tab, /* Back-compat for pre-4.4 */
 
 .nav-tab-active {
 	margin-bottom: -1px;
-	color: #464646;
+	color: #444;
 }
 
 .nav-tab-active,
@@ -2495,7 +2495,7 @@ div.action-links {
 }
 
 #plugin-information .fyi strong {
-	color: #464646;
+	color: #444;
 }
 
 #plugin-information .fyi h3 {
@@ -2885,16 +2885,6 @@ img {
 	border: none;
 }
 
-/* Header */
-/* @todo: are these also specific to Press This? */
-#wphead {
-	border-bottom: 1px solid #dfdfdf;
-}
-
-#wphead h1 a {
-	color: #464646;
-}
-
 /* Metabox collapse arrow indicators */
 .js .sidebar-name .sidebar-name-arrow:before,
 .js .meta-box-sortables .postbox .toggle-indicator:before {
@@ -3129,7 +3119,7 @@ img {
 
 /* Accordion */
 .accordion-section {
-	border-bottom: 1px solid #dfdfdf;
+	border-bottom: 1px solid #ddd;
 	margin: 0;
 }
 
@@ -3139,7 +3129,7 @@ img {
 }
 
 .accordion-section.open:hover {
-	border-bottom-color: #dfdfdf;
+	border-bottom-color: #ddd;
 }
 
 .accordion-section-content {
@@ -3153,8 +3143,8 @@ img {
 	margin: 0;
 	padding: 12px 15px 15px;
 	position: relative;
-	border-left: 1px solid #dfdfdf;
-	border-right: 1px solid #dfdfdf;
+	border-left: 1px solid #ddd;
+	border-right: 1px solid #ddd;
 	-webkit-user-select: none;
 	-moz-user-select: none;
 	-ms-user-select: none;
@@ -3211,7 +3201,7 @@ img {
 
 .control-section.open .accordion-section-title {
 	/* When expanded */
-	border-bottom: 1px solid #dfdfdf;
+	border-bottom: 1px solid #ddd;
 }
 
 /* Edit Site */
diff --git a/src/wp-admin/css/customize-controls.css b/src/wp-admin/css/customize-controls.css
index 7824c829e4..941279d1c6 100644
--- a/src/wp-admin/css/customize-controls.css
+++ b/src/wp-admin/css/customize-controls.css
@@ -1443,7 +1443,7 @@ body.adding-widget .add-new-widget:before,
 	z-index: 1;
 	width: 300px;
 	background: #eee;
-	border-bottom: 1px solid #e4e4e4;
+	border-bottom: 1px solid #e5e5e5;
 }
 
 /* search field container */
@@ -1476,7 +1476,7 @@ body.adding-widget .add-new-widget:before,
 	position: relative;
 	padding: 20px 15px 20px 60px;
 	background: #fff;
-	border-bottom: 1px solid #e4e4e4;
+	border-bottom: 1px solid #e5e5e5;
 	cursor: pointer;
 	display: none;
 }
diff --git a/src/wp-admin/css/customize-widgets.css b/src/wp-admin/css/customize-widgets.css
index 34141b137d..d7587310c1 100644
--- a/src/wp-admin/css/customize-widgets.css
+++ b/src/wp-admin/css/customize-widgets.css
@@ -130,7 +130,7 @@
 #customize-theme-controls .move-widget-area {
 	display: none;
 	background: #fff;
-	border: 1px solid #dedede;
+	border: 1px solid #ddd;
 	border-top: none;
 	cursor: auto;
 }
diff --git a/src/wp-admin/css/dashboard.css b/src/wp-admin/css/dashboard.css
index 7340cb400d..3968a979f9 100644
--- a/src/wp-admin/css/dashboard.css
+++ b/src/wp-admin/css/dashboard.css
@@ -196,7 +196,7 @@
 
 .welcome-panel-column p {
 	margin-top: 7px;
-	color: #464646;
+	color: #444;
 }
 
 .welcome-panel .welcome-widgets-menus {
diff --git a/src/wp-admin/css/deprecated-media.css b/src/wp-admin/css/deprecated-media.css
index 5365a18e92..db2a017a4e 100644
--- a/src/wp-admin/css/deprecated-media.css
+++ b/src/wp-admin/css/deprecated-media.css
@@ -5,7 +5,7 @@ div#media-upload-header {
 	padding: 5px 5px 0;
 	font-weight: bold;
 	position: relative;
-	border-bottom: 1px solid #dfdfdf;
+	border-bottom: 1px solid #ddd;
 	background: #f9f9f9;
 }
 
@@ -28,7 +28,7 @@ div#media-upload-header {
 	float: left;
 	line-height: 28px;
 	border-top: 1px solid #f9f9f9;
-	border-bottom: 1px solid #dfdfdf;
+	border-bottom: 1px solid #ddd;
 	background-color: #f9f9f9;
 	text-decoration: none;
 	-webkit-transition: none;
@@ -49,7 +49,7 @@ div#media-upload-header {
 	font-weight: normal;
 	padding-left: 6px;
 	padding-right: 6px;
-	border: 1px solid #dfdfdf;
+	border: 1px solid #ddd;
 	border-bottom-color: #f1f1f1;
 	background-color: #f1f1f1;
 	color: #000;
@@ -62,7 +62,7 @@ div#media-upload-header {
 }
 
 #media-upload .slidetoggle {
-	border-top-color: #dfdfdf;
+	border-top-color: #ddd;
 }
 
 #media-upload input[type="radio"] {
@@ -328,7 +328,7 @@ h4.media-sub-title {
 #gallery-settings label,
 #gallery-settings legend {
 	font-size: 13px;
-	color: #464646;
+	color: #444;
 	margin-right: 15px;
 }
 
@@ -337,7 +337,7 @@ h4.media-sub-title {
 }
 
 #gallery-settings p.ml-submit {
-	border-top: 1px solid #dfdfdf;
+	border-top: 1px solid #ddd;
 }
 
 #gallery-settings select#columns {
diff --git a/src/wp-admin/css/edit.css b/src/wp-admin/css/edit.css
index b362ceac2f..6ed7cbc76e 100644
--- a/src/wp-admin/css/edit.css
+++ b/src/wp-admin/css/edit.css
@@ -74,12 +74,6 @@
 	padding: 11px 10px;
 }
 
-#poststuff .inside-submitbox,
-#side-sortables .inside-submitbox {
-	margin: 0 3px;
-	font-size: 11px;
-}
-
 input#link_description,
 input#link_url {
 	width: 98%;
@@ -135,14 +129,6 @@ input#link_url {
 	float: left;
 }
 
-.submitbox .submit {
-	text-align: left;
-	padding: 12px 10px 10px;
-	font-size: 11px;
-	background-color: #464646;
-	color: #ccc;
-}
-
 .submitbox .submitdelete {
 	text-decoration: none;
 	padding: 1px 2px;
@@ -166,10 +152,6 @@ stray rule may actually be compensated for elsewhere. */
 	padding: 6px;
 }
 
-.inside-submitbox #post_status {
-	margin: 2px 0 2px -2px;
-}
-
 #post-status-select {
 	margin-top: 3px;
 }
@@ -271,11 +253,6 @@ ul.category-tabs li,
 	border: 0 none;
 }
 
-#side-sortables .inside-submitbox .insidebox,
-.stuffbox .insidebox {
-	margin: 11px 0;
-}
-
 /* @todo: make this a more generic class */
 ul.category-tabs,
 ul.add-menu-item-tabs,
@@ -292,7 +269,7 @@ ul.add-menu-item-tabs li {
 ul.category-tabs li.tabs,
 ul.add-menu-item-tabs li.tabs,
 .wp-tab-active {
-	border: 1px solid #dfdfdf;
+	border: 1px solid #ddd;
 	border-bottom-color: #fdfdfd;
 	background-color: #fdfdfd;
 }
@@ -727,7 +704,7 @@ span.wp-media-buttons-icon:before {
 #postcustomstuff table {
 	margin: 0;
 	width: 100%;
-	border: 1px solid #dfdfdf;
+	border: 1px solid #ddd;
 	border-spacing: 0;
 	background-color: #f9f9f9;
 }
@@ -960,7 +937,7 @@ a.post-state-format.format-link:before {
 	max-height: 200px;
 	overflow: auto;
 	padding: 0 0.9em;
-	border: solid 1px #dfdfdf;
+	border: solid 1px #ddd;
 	background-color: #fdfdfd;
 }
 
diff --git a/src/wp-admin/css/ie.css b/src/wp-admin/css/ie.css
index 78f84e0c11..fe9bc436ab 100644
--- a/src/wp-admin/css/ie.css
+++ b/src/wp-admin/css/ie.css
@@ -244,7 +244,7 @@ table.fixed td {
 }
 
 #wpbody-content .postbox {
-	border: 1px solid #dfdfdf;
+	border: 1px solid #ddd;
 }
 
 #wpbody-content .postbox .hndle {
@@ -687,7 +687,7 @@ input[type="password"],
 * html .stuffbox,
 * html .stuffbox input,
 * html .stuffbox textarea {
-	border: 1px solid #DFDFDF;
+	border: 1px solid #ddd;
 }
 
 * html div.widget-liquid-left {
@@ -721,7 +721,7 @@ input[type="password"],
 }
 
 * html input {
-	border: 1px solid #dfdfdf;
+	border: 1px solid #ddd;
 }
 
 * html .edit-box {
diff --git a/src/wp-admin/css/install.css b/src/wp-admin/css/install.css
index c033ea5500..55fbe54330 100644
--- a/src/wp-admin/css/install.css
+++ b/src/wp-admin/css/install.css
@@ -39,7 +39,7 @@ a:focus {
 }
 
 h1, h2 {
-	border-bottom: 1px solid #dedede;
+	border-bottom: 1px solid #ddd;
 	clear: both;
 	color: #666;
 	font-size: 24px;
@@ -131,7 +131,7 @@ label {
 	vertical-align: middle;
 }
 textarea {
-	border: 1px solid #dfdfdf;
+	border: 1px solid #ddd;
 	font-family: "Open Sans", sans-serif;
 	width: 100%;
 	-webkit-box-sizing: border-box;
diff --git a/src/wp-admin/css/list-tables.css b/src/wp-admin/css/list-tables.css
index d9fa19a7a7..13c9ddfb5c 100644
--- a/src/wp-admin/css/list-tables.css
+++ b/src/wp-admin/css/list-tables.css
@@ -697,7 +697,7 @@ th.asc a:focus span.sorting-indicator {
 	min-width: 17px;
 	border: 1px solid #ccc; /* same color as buttons border */
 	padding: 3px 5px 7px;
-	background: #e4e4e4;
+	background: #e5e5e5;
 	font-size: 16px;
 	line-height: 1;
 	font-weight: normal;
@@ -1473,7 +1473,7 @@ tr.active + tr.plugin-update-tr:not(.updated) .plugin-update .update-message {
 	width: -webkit-calc( 50% - 8px );
 	width: calc( 50% - 8px );
 	background-color: #fff;
-	border: 1px solid #dedede;
+	border: 1px solid #ddd;
 	-webkit-box-sizing: border-box;
 	-moz-box-sizing: border-box;
 	box-sizing: border-box;
@@ -1560,7 +1560,7 @@ div.action-links,
 	clear: both;
 	padding: 12px 20px;
 	background-color: #fafafa;
-	border-top: 1px solid #dedede;
+	border-top: 1px solid #ddd;
 	overflow: hidden;
 }
 
@@ -1575,8 +1575,8 @@ div.action-links,
 .plugin-card-update-failed .notice-error {
 	margin: 0;
 	padding-left: 16px;
-	-webkit-box-shadow: 0 -1px 0 #dedede;
-	box-shadow: 0 -1px 0 #dedede;
+	-webkit-box-shadow: 0 -1px 0 #ddd;
+	box-shadow: 0 -1px 0 #ddd;
 }
 
 .plugin-card-update-failed .plugin-card-bottom {
diff --git a/src/wp-admin/css/media.css b/src/wp-admin/css/media.css
index 0912854505..71424c914c 100644
--- a/src/wp-admin/css/media.css
+++ b/src/wp-admin/css/media.css
@@ -5,7 +5,7 @@
 .media-item .describe {
 	border-collapse: collapse;
 	width: 100%;
-	border-top: 1px solid #dfdfdf;
+	border-top: 1px solid #ddd;
 	clear: both;
 	cursor: default;
 }
@@ -124,8 +124,8 @@
 
 .media-upload-form .media-item,
 .media-upload-form .media-item .error {
-	-webkit-box-shadow: 0 1px 0 #dfdfdf;
-	box-shadow: 0 1px 0 #dfdfdf;
+	-webkit-box-shadow: 0 1px 0 #ddd;
+	box-shadow: 0 1px 0 #ddd;
 }
 
 #media-items:empty {
@@ -242,7 +242,7 @@
 
 .find-box-head {
 	background: #fcfcfc;
-	border-bottom: 1px solid #dfdfdf;
+	border-bottom: 1px solid #ddd;
 	height: 36px;
 	font-size: 18px;
 	font-weight: 600;
@@ -326,7 +326,7 @@
 .find-box-buttons {
 	padding: 8px 16px;
 	background: #fcfcfc;
-	border-top: 1px solid #dfdfdf;
+	border-top: 1px solid #ddd;
 	position: absolute;
 	bottom: 0;
 	left: 0;
diff --git a/src/wp-admin/css/nav-menus.css b/src/wp-admin/css/nav-menus.css
index 5e8abf76a0..a230d9d541 100644
--- a/src/wp-admin/css/nav-menus.css
+++ b/src/wp-admin/css/nav-menus.css
@@ -160,7 +160,7 @@ ul.add-menu-item-tabs li {
 .nav-menus-php #post-body {
 	padding: 0 10px 10px;
 	border-top: 1px solid #fff;
-	border-bottom: 1px solid #dfdfdf;
+	border-bottom: 1px solid #ddd;
 	background: #fff;
 }
 
@@ -170,7 +170,7 @@ ul.add-menu-item-tabs li {
 }
 
 #nav-menu-header {
-	border-bottom: 1px solid #dfdfdf;
+	border-bottom: 1px solid #ddd;
 	margin-bottom: 0;
 }
 
@@ -442,7 +442,7 @@ ul.add-menu-item-tabs li {
 }
 
 .menu-item-bar .menu-item-handle {
-	border: 1px solid #dfdfdf;
+	border: 1px solid #ddd;
 	position: relative;
 	padding: 10px 15px;
 	height: auto;
@@ -673,7 +673,7 @@ body.menu-max-depth-11 { min-width: 1280px !important; }
 	display: block;
 	margin: 0 0 10px;
 	padding: 3px 5px 5px;
-	border: 1px solid #dfdfdf;
+	border: 1px solid #ddd;
 	color: #72777c;
 	font-size: 12px;
 	font-style: italic;
diff --git a/src/wp-admin/css/press-this.css b/src/wp-admin/css/press-this.css
index b9f001cf96..73dadce4e7 100644
--- a/src/wp-admin/css/press-this.css
+++ b/src/wp-admin/css/press-this.css
@@ -1380,7 +1380,7 @@ html {
 	bottom: 0;
 	padding: 0 1.07143em;
 	background: #f7f7f7;
-	border-color: #dedede;
+	border-color: #ddd;
 	border: 0;
 	border-left: 1px solid #f1f1f1;
 	-webkit-border-radius: 0;
diff --git a/src/wp-admin/css/themes.css b/src/wp-admin/css/themes.css
index 1c7c0961a7..988db9925a 100644
--- a/src/wp-admin/css/themes.css
+++ b/src/wp-admin/css/themes.css
@@ -54,7 +54,7 @@
 	margin: 0 4% 4% 0;
 	position: relative;
 	width: 30.6%;
-	border: 1px solid #dedede;
+	border: 1px solid #ddd;
 	-webkit-box-shadow: 0 1px 1px -1px rgba(0,0,0,0.1);
 	box-shadow: 0 1px 1px -1px rgba(0,0,0,0.1);
 	-webkit-box-sizing: border-box;
@@ -1161,7 +1161,7 @@ body.show-upload-theme p.no-themes {
 ------------------------------------------------------------------------------*/
 
 .appearance_page_custom-header #headimg {
-	border: 1px solid #DFDFDF;
+	border: 1px solid #ddd;
 	overflow: hidden;
 	width: 100%;
 }
@@ -1197,7 +1197,7 @@ body.show-upload-theme p.no-themes {
 
 div#custom-background-image {
 	min-height: 100px;
-	border: 1px solid #dfdfdf;
+	border: 1px solid #ddd;
 }
 
 div#custom-background-image img {
diff --git a/src/wp-includes/css/editor.css b/src/wp-includes/css/editor.css
index 383a3b5cf7..c85f53c4f2 100644
--- a/src/wp-includes/css/editor.css
+++ b/src/wp-includes/css/editor.css
@@ -37,7 +37,7 @@
 
 .mce-window .mce-window-head {
 	background: #fcfcfc;
-	border-bottom: 1px solid #dfdfdf;
+	border-bottom: 1px solid #ddd;
 	padding: 0;
 	min-height: 36px;
 }
@@ -91,7 +91,7 @@ div.mce-tab:focus {
 }
 
 .mce-window .mce-foot {
-	border-top: 1px solid #dfdfdf;
+	border-top: 1px solid #ddd;
 }
 
 .mce-textbox,
@@ -245,7 +245,7 @@ div.mce-tab {
 
 /* TinyMCE toolbars */
 div.mce-toolbar-grp {
-	border-bottom: 1px solid #dedede;
+	border-bottom: 1px solid #ddd;
 	background: #f5f5f5;
 	padding: 0;
 	position: relative;
@@ -771,7 +771,7 @@ div.mce-menu .mce-menu-item-sep,
 
 .mce-charmap td {
 	padding: 0;
-	border-color: #dfdfdf;
+	border-color: #ddd;
 	cursor: pointer;
 }
 
@@ -1182,7 +1182,7 @@ i.mce-i-wp_code:before {
 
 .wp-media-buttons a {
 	text-decoration: none;
-	color: #464646;
+	color: #444;
 	font-size: 12px;
 }
 
@@ -1218,7 +1218,7 @@ i.mce-i-wp_code:before {
 .quicktags-toolbar {
 	padding: 3px;
 	position: relative;
-	border-bottom: 1px solid #dedede;
+	border-bottom: 1px solid #ddd;
 	background: #f5f5f5;
 	min-height: 30px;
 }
@@ -1383,7 +1383,7 @@ i.mce-i-wp_code:before {
 
 #link-modal-title {
 	background: #fcfcfc;
-	border-bottom: 1px solid #dfdfdf;
+	border-bottom: 1px solid #ddd;
 	height: 36px;
 	font-size: 18px;
 	font-weight: 600;
@@ -1510,7 +1510,7 @@ i.mce-i-wp_code:before {
 }
 
 #wp-link li.unselectable {
-	border-bottom: 1px solid #dfdfdf;
+	border-bottom: 1px solid #ddd;
 }
 
 #wp-link li.unselectable:hover {
@@ -1552,7 +1552,7 @@ i.mce-i-wp_code:before {
 #wp-link .submitbox {
 	padding: 8px 16px;
 	background: #fcfcfc;
-	border-top: 1px solid #dfdfdf;
+	border-top: 1px solid #ddd;
 	position: absolute;
 	bottom: 0;
 	left: 0;
diff --git a/src/wp-includes/css/jquery-ui-dialog.css b/src/wp-includes/css/jquery-ui-dialog.css
index 8b6971d4bc..bc375077c3 100644
--- a/src/wp-includes/css/jquery-ui-dialog.css
+++ b/src/wp-includes/css/jquery-ui-dialog.css
@@ -280,7 +280,7 @@
 
 .ui-dialog-titlebar {
 	background: #fcfcfc;
-	border-bottom: 1px solid #dfdfdf;
+	border-bottom: 1px solid #ddd;
 	height: 36px;
 	font-size: 18px;
 	font-weight: 600;
@@ -332,7 +332,7 @@
 
 .ui-dialog-buttonpane {
 	background: #fcfcfc;
-	border-top: 1px solid #dfdfdf;
+	border-top: 1px solid #ddd;
 	padding: 16px;
 }
 
diff --git a/src/wp-includes/css/media-views.css b/src/wp-includes/css/media-views.css
index 768b0b51bb..7f69a0edbd 100644
--- a/src/wp-includes/css/media-views.css
+++ b/src/wp-includes/css/media-views.css
@@ -84,7 +84,7 @@
 	font-size: 12px;
 	border-width: 1px;
 	border-style: solid;
-	border-color: #dfdfdf;
+	border-color: #ddd;
 }
 
 .media-frame input[type="text"]:focus,
@@ -271,7 +271,7 @@
 	z-index: 100;
 	height: 60px;
 	padding: 0 16px;
-	border: 0 solid #dfdfdf;
+	border: 0 solid #ddd;
 	overflow: hidden;
 }
 
@@ -722,7 +722,7 @@
 }
 
 .media-frame.hide-router .media-frame-title {
-	border-bottom: 1px solid #dfdfdf;
+	border-bottom: 1px solid #ddd;
 	-webkit-box-shadow: 0 4px 4px -4px rgba( 0, 0, 0, 0.1 );
 	box-shadow: 0 4px 4px -4px rgba( 0, 0, 0, 0.1 );
 }
@@ -806,7 +806,7 @@
 	margin-top: 11px;
 	padding: 4px;
 	font-size: 13px;
-	color: #464646;
+	color: #444;
 	font-family: "Open Sans", sans-serif;
 	-webkit-appearance: none;
 }
@@ -831,7 +831,7 @@
 	float: left;
 	padding: 8px;
 	margin: 0;
-	color: #464646;
+	color: #444;
 	cursor: pointer;
 	list-style: none;
 	text-align: center;
@@ -1176,7 +1176,7 @@
 	margin: 10px auto;
 	-webkit-border-radius: 10px;
 	border-radius: 10px;
-	background: #dfdfdf;
+	background: #ddd;
 	background: rgba( 0, 0, 0, 0.1 );
 }
 
@@ -1235,7 +1235,7 @@
 }
 
 .media-uploader-status .upload-count {
-	color: #464646;
+	color: #444;
 }
 
 .media-uploader-status .upload-dismiss-errors,
@@ -1373,7 +1373,7 @@
 
 .uploader-inline .has-upload-message .upload-instructions {
 	font-size: 14px;
-	color: #464646;
+	color: #444;
 	font-weight: normal;
 }
 
@@ -1446,7 +1446,7 @@
 	padding: 1px 8px;
 	margin: 1px 8px 1px -8px;
 	line-height: 16px;
-	border-right: 1px solid #dfdfdf;
+	border-right: 1px solid #ddd;
 	color: #0073aa;
 }
 
@@ -1617,7 +1617,7 @@
 
 .attachment-info .filename {
 	font-weight: bold;
-	color: #464646;
+	color: #444;
 	word-wrap: break-word;
 }
 
diff --git a/src/wp-includes/css/wp-pointer.css b/src/wp-includes/css/wp-pointer.css
index bea8ad65bb..d58170ee6e 100644
--- a/src/wp-includes/css/wp-pointer.css
+++ b/src/wp-includes/css/wp-pointer.css
@@ -3,7 +3,7 @@
 	position: relative;
 	font-size: 13px;
 	background: #fff;
-	border: 1px solid #dfdfdf;
+	border: 1px solid #ddd;
 	-webkit-box-shadow: 0 3px 6px rgba(0,0,0,0.075);
 	box-shadow: 0 3px 6px rgba(0,0,0,0.075);
 }
diff --git a/src/wp-includes/js/mediaelement/wp-mediaelement.css b/src/wp-includes/js/mediaelement/wp-mediaelement.css
index 097409b158..e4d4202d6c 100644
--- a/src/wp-includes/js/mediaelement/wp-mediaelement.css
+++ b/src/wp-includes/js/mediaelement/wp-mediaelement.css
@@ -261,7 +261,7 @@ video.wp-video-shortcode,
 }
 
 .wp-playlist-dark .wp-playlist-caption {
-	color: #dedede;
+	color: #ddd;
 }
 
 .wp-playlist-playing {
diff --git a/src/wp-includes/js/thickbox/thickbox.css b/src/wp-includes/js/thickbox/thickbox.css
index 11673a5562..28c99adf4e 100644
--- a/src/wp-includes/js/thickbox/thickbox.css
+++ b/src/wp-includes/js/thickbox/thickbox.css
@@ -64,7 +64,7 @@
 
 #TB_title {
 	background: #fcfcfc;
-	border-bottom: 1px solid #dfdfdf;
+	border-bottom: 1px solid #ddd;
 	height: 29px;
 }
 
diff --git a/src/wp-includes/js/tinymce/skins/wordpress/wp-content.css b/src/wp-includes/js/tinymce/skins/wordpress/wp-content.css
index f4a1782a8a..d5badccb2a 100644
--- a/src/wp-includes/js/tinymce/skins/wordpress/wp-content.css
+++ b/src/wp-includes/js/tinymce/skins/wordpress/wp-content.css
@@ -364,7 +364,7 @@ audio {
 }
 
 .wpview-error {
-	border: 1px solid #dedede;
+	border: 1px solid #ddd;
 	padding: 1em 0;
 	margin: 0;
 	word-wrap: break-word;