diff --git a/wp-admin/css/colors/_mixins.scss b/wp-admin/css/colors/_mixins.scss
index c8213c18c6..b9dd2efe89 100644
--- a/wp-admin/css/colors/_mixins.scss
+++ b/wp-admin/css/colors/_mixins.scss
@@ -2,7 +2,7 @@
  * Button mixin- creates 3d-ish button effect with correct
  * highlights/shadows, based on a base color.
  */
-@mixin button( $button-color, $text-color: white ) {
+@mixin button( $button-color, $text-color: #fff ) {
 	background: $button-color;
 	border-color: darken( $button-color, 10% ) darken( $button-color, 15% ) darken( $button-color, 15% );
 	color: $text-color;
diff --git a/wp-admin/css/colors/blue/colors-rtl.css b/wp-admin/css/colors/blue/colors-rtl.css
index dd214af2ef..8718eaad23 100644
--- a/wp-admin/css/colors/blue/colors-rtl.css
+++ b/wp-admin/css/colors/blue/colors-rtl.css
@@ -40,7 +40,7 @@ input[type=radio]:checked:before {
 .wp-core-ui .button-primary {
   background: #e1a948;
   border-color: #d39323 #bd831f #bd831f;
-  color: white;
+  color: #fff;
   -webkit-box-shadow: 0 1px 0 #bd831f;
   box-shadow: 0 1px 0 #bd831f;
   text-shadow: 0 -1px 1px #bd831f, -1px 0 1px #bd831f, 0 1px 1px #bd831f, 1px 0 1px #bd831f;
@@ -49,7 +49,7 @@ input[type=radio]:checked:before {
 .wp-core-ui .button-primary:hover, .wp-core-ui .button-primary:focus {
   background: #e3af55;
   border-color: #bd831f;
-  color: white;
+  color: #fff;
   -webkit-box-shadow: 0 1px 0 #bd831f;
   box-shadow: 0 1px 0 #bd831f;
 }
diff --git a/wp-admin/css/colors/blue/colors.css b/wp-admin/css/colors/blue/colors.css
index 14835f8a46..3c6f434aa8 100644
--- a/wp-admin/css/colors/blue/colors.css
+++ b/wp-admin/css/colors/blue/colors.css
@@ -40,7 +40,7 @@ input[type=radio]:checked:before {
 .wp-core-ui .button-primary {
   background: #e1a948;
   border-color: #d39323 #bd831f #bd831f;
-  color: white;
+  color: #fff;
   -webkit-box-shadow: 0 1px 0 #bd831f;
   box-shadow: 0 1px 0 #bd831f;
   text-shadow: 0 -1px 1px #bd831f, 1px 0 1px #bd831f, 0 1px 1px #bd831f, -1px 0 1px #bd831f;
@@ -49,7 +49,7 @@ input[type=radio]:checked:before {
 .wp-core-ui .button-primary:hover, .wp-core-ui .button-primary:focus {
   background: #e3af55;
   border-color: #bd831f;
-  color: white;
+  color: #fff;
   -webkit-box-shadow: 0 1px 0 #bd831f;
   box-shadow: 0 1px 0 #bd831f;
 }
diff --git a/wp-admin/css/colors/coffee/colors-rtl.css b/wp-admin/css/colors/coffee/colors-rtl.css
index d82f7af8a4..f93eefef3b 100644
--- a/wp-admin/css/colors/coffee/colors-rtl.css
+++ b/wp-admin/css/colors/coffee/colors-rtl.css
@@ -40,7 +40,7 @@ input[type=radio]:checked:before {
 .wp-core-ui .button-primary {
   background: #c7a589;
   border-color: #b78b66 #ae7d55 #ae7d55;
-  color: white;
+  color: #fff;
   -webkit-box-shadow: 0 1px 0 #ae7d55;
   box-shadow: 0 1px 0 #ae7d55;
   text-shadow: 0 -1px 1px #ae7d55, -1px 0 1px #ae7d55, 0 1px 1px #ae7d55, 1px 0 1px #ae7d55;
@@ -49,7 +49,7 @@ input[type=radio]:checked:before {
 .wp-core-ui .button-primary:hover, .wp-core-ui .button-primary:focus {
   background: #ccad93;
   border-color: #ae7d55;
-  color: white;
+  color: #fff;
   -webkit-box-shadow: 0 1px 0 #ae7d55;
   box-shadow: 0 1px 0 #ae7d55;
 }
diff --git a/wp-admin/css/colors/coffee/colors.css b/wp-admin/css/colors/coffee/colors.css
index 7f3a63d8a3..dd6be904c7 100644
--- a/wp-admin/css/colors/coffee/colors.css
+++ b/wp-admin/css/colors/coffee/colors.css
@@ -40,7 +40,7 @@ input[type=radio]:checked:before {
 .wp-core-ui .button-primary {
   background: #c7a589;
   border-color: #b78b66 #ae7d55 #ae7d55;
-  color: white;
+  color: #fff;
   -webkit-box-shadow: 0 1px 0 #ae7d55;
   box-shadow: 0 1px 0 #ae7d55;
   text-shadow: 0 -1px 1px #ae7d55, 1px 0 1px #ae7d55, 0 1px 1px #ae7d55, -1px 0 1px #ae7d55;
@@ -49,7 +49,7 @@ input[type=radio]:checked:before {
 .wp-core-ui .button-primary:hover, .wp-core-ui .button-primary:focus {
   background: #ccad93;
   border-color: #ae7d55;
-  color: white;
+  color: #fff;
   -webkit-box-shadow: 0 1px 0 #ae7d55;
   box-shadow: 0 1px 0 #ae7d55;
 }
diff --git a/wp-admin/css/colors/ectoplasm/colors-rtl.css b/wp-admin/css/colors/ectoplasm/colors-rtl.css
index 17d5a423b6..b28e79829a 100644
--- a/wp-admin/css/colors/ectoplasm/colors-rtl.css
+++ b/wp-admin/css/colors/ectoplasm/colors-rtl.css
@@ -40,7 +40,7 @@ input[type=radio]:checked:before {
 .wp-core-ui .button-primary {
   background: #a3b745;
   border-color: #829237 #727f30 #727f30;
-  color: white;
+  color: #fff;
   -webkit-box-shadow: 0 1px 0 #727f30;
   box-shadow: 0 1px 0 #727f30;
   text-shadow: 0 -1px 1px #727f30, -1px 0 1px #727f30, 0 1px 1px #727f30, 1px 0 1px #727f30;
@@ -49,7 +49,7 @@ input[type=radio]:checked:before {
 .wp-core-ui .button-primary:hover, .wp-core-ui .button-primary:focus {
   background: #a9bd4f;
   border-color: #727f30;
-  color: white;
+  color: #fff;
   -webkit-box-shadow: 0 1px 0 #727f30;
   box-shadow: 0 1px 0 #727f30;
 }
diff --git a/wp-admin/css/colors/ectoplasm/colors.css b/wp-admin/css/colors/ectoplasm/colors.css
index 980a0c3b68..cbea0781fb 100644
--- a/wp-admin/css/colors/ectoplasm/colors.css
+++ b/wp-admin/css/colors/ectoplasm/colors.css
@@ -40,7 +40,7 @@ input[type=radio]:checked:before {
 .wp-core-ui .button-primary {
   background: #a3b745;
   border-color: #829237 #727f30 #727f30;
-  color: white;
+  color: #fff;
   -webkit-box-shadow: 0 1px 0 #727f30;
   box-shadow: 0 1px 0 #727f30;
   text-shadow: 0 -1px 1px #727f30, 1px 0 1px #727f30, 0 1px 1px #727f30, -1px 0 1px #727f30;
@@ -49,7 +49,7 @@ input[type=radio]:checked:before {
 .wp-core-ui .button-primary:hover, .wp-core-ui .button-primary:focus {
   background: #a9bd4f;
   border-color: #727f30;
-  color: white;
+  color: #fff;
   -webkit-box-shadow: 0 1px 0 #727f30;
   box-shadow: 0 1px 0 #727f30;
 }
diff --git a/wp-admin/css/colors/light/colors-rtl.css b/wp-admin/css/colors/light/colors-rtl.css
index 5822584f3a..34b8513cd0 100644
--- a/wp-admin/css/colors/light/colors-rtl.css
+++ b/wp-admin/css/colors/light/colors-rtl.css
@@ -40,7 +40,7 @@ input[type=radio]:checked:before {
 .wp-core-ui .button-primary {
   background: #04a4cc;
   border-color: #037c9a #036881 #036881;
-  color: white;
+  color: #fff;
   -webkit-box-shadow: 0 1px 0 #036881;
   box-shadow: 0 1px 0 #036881;
   text-shadow: 0 -1px 1px #036881, -1px 0 1px #036881, 0 1px 1px #036881, 1px 0 1px #036881;
@@ -49,7 +49,7 @@ input[type=radio]:checked:before {
 .wp-core-ui .button-primary:hover, .wp-core-ui .button-primary:focus {
   background: #04b0db;
   border-color: #036881;
-  color: white;
+  color: #fff;
   -webkit-box-shadow: 0 1px 0 #036881;
   box-shadow: 0 1px 0 #036881;
 }
diff --git a/wp-admin/css/colors/light/colors.css b/wp-admin/css/colors/light/colors.css
index d1b05ddee3..31f706f313 100644
--- a/wp-admin/css/colors/light/colors.css
+++ b/wp-admin/css/colors/light/colors.css
@@ -40,7 +40,7 @@ input[type=radio]:checked:before {
 .wp-core-ui .button-primary {
   background: #04a4cc;
   border-color: #037c9a #036881 #036881;
-  color: white;
+  color: #fff;
   -webkit-box-shadow: 0 1px 0 #036881;
   box-shadow: 0 1px 0 #036881;
   text-shadow: 0 -1px 1px #036881, 1px 0 1px #036881, 0 1px 1px #036881, -1px 0 1px #036881;
@@ -49,7 +49,7 @@ input[type=radio]:checked:before {
 .wp-core-ui .button-primary:hover, .wp-core-ui .button-primary:focus {
   background: #04b0db;
   border-color: #036881;
-  color: white;
+  color: #fff;
   -webkit-box-shadow: 0 1px 0 #036881;
   box-shadow: 0 1px 0 #036881;
 }
diff --git a/wp-admin/css/colors/midnight/colors-rtl.css b/wp-admin/css/colors/midnight/colors-rtl.css
index 2e4990f654..c91ac3b294 100644
--- a/wp-admin/css/colors/midnight/colors-rtl.css
+++ b/wp-admin/css/colors/midnight/colors-rtl.css
@@ -40,7 +40,7 @@ input[type=radio]:checked:before {
 .wp-core-ui .button-primary {
   background: #e14d43;
   border-color: #d02c21 #ba281e #ba281e;
-  color: white;
+  color: #fff;
   -webkit-box-shadow: 0 1px 0 #ba281e;
   box-shadow: 0 1px 0 #ba281e;
   text-shadow: 0 -1px 1px #ba281e, -1px 0 1px #ba281e, 0 1px 1px #ba281e, 1px 0 1px #ba281e;
@@ -49,7 +49,7 @@ input[type=radio]:checked:before {
 .wp-core-ui .button-primary:hover, .wp-core-ui .button-primary:focus {
   background: #e35950;
   border-color: #ba281e;
-  color: white;
+  color: #fff;
   -webkit-box-shadow: 0 1px 0 #ba281e;
   box-shadow: 0 1px 0 #ba281e;
 }
diff --git a/wp-admin/css/colors/midnight/colors.css b/wp-admin/css/colors/midnight/colors.css
index a94d472d19..89b63e8ec7 100644
--- a/wp-admin/css/colors/midnight/colors.css
+++ b/wp-admin/css/colors/midnight/colors.css
@@ -40,7 +40,7 @@ input[type=radio]:checked:before {
 .wp-core-ui .button-primary {
   background: #e14d43;
   border-color: #d02c21 #ba281e #ba281e;
-  color: white;
+  color: #fff;
   -webkit-box-shadow: 0 1px 0 #ba281e;
   box-shadow: 0 1px 0 #ba281e;
   text-shadow: 0 -1px 1px #ba281e, 1px 0 1px #ba281e, 0 1px 1px #ba281e, -1px 0 1px #ba281e;
@@ -49,7 +49,7 @@ input[type=radio]:checked:before {
 .wp-core-ui .button-primary:hover, .wp-core-ui .button-primary:focus {
   background: #e35950;
   border-color: #ba281e;
-  color: white;
+  color: #fff;
   -webkit-box-shadow: 0 1px 0 #ba281e;
   box-shadow: 0 1px 0 #ba281e;
 }
diff --git a/wp-admin/css/colors/ocean/colors-rtl.css b/wp-admin/css/colors/ocean/colors-rtl.css
index 65c0ead43d..b58c7d18ac 100644
--- a/wp-admin/css/colors/ocean/colors-rtl.css
+++ b/wp-admin/css/colors/ocean/colors-rtl.css
@@ -40,7 +40,7 @@ input[type=radio]:checked:before {
 .wp-core-ui .button-primary {
   background: #9ebaa0;
   border-color: #80a583 #719a74 #719a74;
-  color: white;
+  color: #fff;
   -webkit-box-shadow: 0 1px 0 #719a74;
   box-shadow: 0 1px 0 #719a74;
   text-shadow: 0 -1px 1px #719a74, -1px 0 1px #719a74, 0 1px 1px #719a74, 1px 0 1px #719a74;
@@ -49,7 +49,7 @@ input[type=radio]:checked:before {
 .wp-core-ui .button-primary:hover, .wp-core-ui .button-primary:focus {
   background: #a7c0a9;
   border-color: #719a74;
-  color: white;
+  color: #fff;
   -webkit-box-shadow: 0 1px 0 #719a74;
   box-shadow: 0 1px 0 #719a74;
 }
diff --git a/wp-admin/css/colors/ocean/colors.css b/wp-admin/css/colors/ocean/colors.css
index c98d3bed4d..7a246aa008 100644
--- a/wp-admin/css/colors/ocean/colors.css
+++ b/wp-admin/css/colors/ocean/colors.css
@@ -40,7 +40,7 @@ input[type=radio]:checked:before {
 .wp-core-ui .button-primary {
   background: #9ebaa0;
   border-color: #80a583 #719a74 #719a74;
-  color: white;
+  color: #fff;
   -webkit-box-shadow: 0 1px 0 #719a74;
   box-shadow: 0 1px 0 #719a74;
   text-shadow: 0 -1px 1px #719a74, 1px 0 1px #719a74, 0 1px 1px #719a74, -1px 0 1px #719a74;
@@ -49,7 +49,7 @@ input[type=radio]:checked:before {
 .wp-core-ui .button-primary:hover, .wp-core-ui .button-primary:focus {
   background: #a7c0a9;
   border-color: #719a74;
-  color: white;
+  color: #fff;
   -webkit-box-shadow: 0 1px 0 #719a74;
   box-shadow: 0 1px 0 #719a74;
 }
diff --git a/wp-admin/css/colors/sunrise/colors-rtl.css b/wp-admin/css/colors/sunrise/colors-rtl.css
index cd9e9eb48e..7a9ed1a1e8 100644
--- a/wp-admin/css/colors/sunrise/colors-rtl.css
+++ b/wp-admin/css/colors/sunrise/colors-rtl.css
@@ -40,7 +40,7 @@ input[type=radio]:checked:before {
 .wp-core-ui .button-primary {
   background: #dd823b;
   border-color: #c36922 #ad5d1e #ad5d1e;
-  color: white;
+  color: #fff;
   -webkit-box-shadow: 0 1px 0 #ad5d1e;
   box-shadow: 0 1px 0 #ad5d1e;
   text-shadow: 0 -1px 1px #ad5d1e, -1px 0 1px #ad5d1e, 0 1px 1px #ad5d1e, 1px 0 1px #ad5d1e;
@@ -49,7 +49,7 @@ input[type=radio]:checked:before {
 .wp-core-ui .button-primary:hover, .wp-core-ui .button-primary:focus {
   background: #df8a48;
   border-color: #ad5d1e;
-  color: white;
+  color: #fff;
   -webkit-box-shadow: 0 1px 0 #ad5d1e;
   box-shadow: 0 1px 0 #ad5d1e;
 }
diff --git a/wp-admin/css/colors/sunrise/colors.css b/wp-admin/css/colors/sunrise/colors.css
index 88cde5380e..e34683fc13 100644
--- a/wp-admin/css/colors/sunrise/colors.css
+++ b/wp-admin/css/colors/sunrise/colors.css
@@ -40,7 +40,7 @@ input[type=radio]:checked:before {
 .wp-core-ui .button-primary {
   background: #dd823b;
   border-color: #c36922 #ad5d1e #ad5d1e;
-  color: white;
+  color: #fff;
   -webkit-box-shadow: 0 1px 0 #ad5d1e;
   box-shadow: 0 1px 0 #ad5d1e;
   text-shadow: 0 -1px 1px #ad5d1e, 1px 0 1px #ad5d1e, 0 1px 1px #ad5d1e, -1px 0 1px #ad5d1e;
@@ -49,7 +49,7 @@ input[type=radio]:checked:before {
 .wp-core-ui .button-primary:hover, .wp-core-ui .button-primary:focus {
   background: #df8a48;
   border-color: #ad5d1e;
-  color: white;
+  color: #fff;
   -webkit-box-shadow: 0 1px 0 #ad5d1e;
   box-shadow: 0 1px 0 #ad5d1e;
 }
diff --git a/wp-admin/css/common-rtl.css b/wp-admin/css/common-rtl.css
index 5600496678..d4c5cfaffc 100644
--- a/wp-admin/css/common-rtl.css
+++ b/wp-admin/css/common-rtl.css
@@ -680,7 +680,7 @@ ul.striped > :nth-child(odd),
 }
 
 .wp-ui-highlight {
-	color: white;
+	color: #fff;
 	background-color: #1e8cbe;
 }
 .wp-ui-text-highlight {
diff --git a/wp-admin/css/common.css b/wp-admin/css/common.css
index 9db4f52053..0976ed98ee 100644
--- a/wp-admin/css/common.css
+++ b/wp-admin/css/common.css
@@ -680,7 +680,7 @@ ul.striped > :nth-child(odd),
 }
 
 .wp-ui-highlight {
-	color: white;
+	color: #fff;
 	background-color: #1e8cbe;
 }
 .wp-ui-text-highlight {
diff --git a/wp-includes/css/editor-rtl.css b/wp-includes/css/editor-rtl.css
index e57805ff60..c210699bae 100644
--- a/wp-includes/css/editor-rtl.css
+++ b/wp-includes/css/editor-rtl.css
@@ -1147,7 +1147,7 @@ i.mce-i-wp_code:before {
 }
 
 .js .tmce-active .wp-editor-area {
-	color: white;
+	color: #fff;
 }
 
 .tmce-active .quicktags-toolbar {
diff --git a/wp-includes/css/editor.css b/wp-includes/css/editor.css
index fa5e71a741..f0fadef8de 100644
--- a/wp-includes/css/editor.css
+++ b/wp-includes/css/editor.css
@@ -1147,7 +1147,7 @@ i.mce-i-wp_code:before {
 }
 
 .js .tmce-active .wp-editor-area {
-	color: white;
+	color: #fff;
 }
 
 .tmce-active .quicktags-toolbar {
diff --git a/wp-includes/css/wp-embed-template.css b/wp-includes/css/wp-embed-template.css
index 10ff56ef56..28e437c411 100644
--- a/wp-includes/css/wp-embed-template.css
+++ b/wp-includes/css/wp-embed-template.css
@@ -64,7 +64,7 @@ body {
 	font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen-Sans, Ubuntu, Cantarell, "Helvetica Neue", sans-serif;
 	line-height: 1.5;
 	color: #82878c;
-	background: white;
+	background: #fff;
 	border: 1px solid #e5e5e5;
 	-webkit-box-shadow: 0 1px 1px rgba(0, 0, 0, .05);
 	box-shadow: 0 1px 1px rgba(0, 0, 0, .05);
diff --git a/wp-includes/version.php b/wp-includes/version.php
index 37b3303285..b31e55b41d 100644
--- a/wp-includes/version.php
+++ b/wp-includes/version.php
@@ -4,7 +4,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '4.7-alpha-38500';
+$wp_version = '4.7-alpha-38501';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.