Accessibility: Improve and modernize user interface controls: Improve the buttons active CSS class.

- improves the buttons `.active` CSS class for buttons that need to be styled as "pressed"
- update the alternate color schemes `.active` CSS class accordingly
- improves a few icons colors in the alternate color schemes

See #34904.


git-svn-id: https://develop.svn.wordpress.org/trunk@46423 602fd350-edb4-49c9-b593-d223f7449a82

src/wp-admin/css/colors/_admin.scss

@@ -28,7 +28,7 @@ a {
 .curtime #timestamp:before,
 #post-body .misc-pub-revisions:before,
 span.wp-media-buttons-icon:before {
-	color: $link-focus;
+	color: currentColor;
 }
 
 
@@ -99,6 +99,19 @@ textarea:focus {
 		box-shadow: 0 0 0 1px $button-color;
 	}
 
+	.button:active {
+		background: darken( $button-color, 5% );
+		border-color: darken( $button-color, 5% );
+	}
+
+	.button.active,
+	.button.active:focus,
+	.button.active:hover {
+		border-color: darken( $button-color, 5% );
+		color: darken( $button-color, 5% );
+		box-shadow: inset 0 2px 5px -3px darken( $button-color, 5% );
+	}
+
 	.button-primary {
 		@include button( $button-color );
 	}

src/wp-admin/css/colors/_mixins.scss

@@ -20,12 +20,19 @@
 			0 0 0 3px $button-color;
 	}
 
-	&:active,
+	&:active {
+		background: darken( $button-color, 5% );
+		border-color: darken( $button-color, 5% );
+		color: $text-color;
+	}
+
 	&.active,
 	&.active:focus,
 	&.active:hover {
-		background: darken( $button-color, 5% );
+		background: $button-color;
-		border-color: darken( $button-color, 5% );
+		color: $text-color;
+		border-color: darken( $button-color, 15% );
+		box-shadow: inset 0 2px 5px -3px darken( $button-color, 50% );
 	}
 
 	&[disabled],

src/wp-includes/css/buttons.css

@@ -146,8 +146,7 @@ TABLE OF CONTENTS:
 	outline-offset: 0;
 }
 
-.wp-core-ui .button.active,
+/* :active state */
-.wp-core-ui .button.active:hover,
 .wp-core-ui .button:active,
 .wp-core-ui .button-secondary:active {
 	background: #f3f5f6;
@@ -155,9 +154,20 @@ TABLE OF CONTENTS:
 	box-shadow: none;
 }
 
+/* pressed state e.g. a selected setting */
+.wp-core-ui .button.active,
+.wp-core-ui .button.active:hover {
+	background-color: #e2e4e7;
+	color: #00669b;
+	border-color: #016087;
+	box-shadow: inset 0 2px 5px -3px #016087;
+}
+
 .wp-core-ui .button.active:focus {
-	border-color: #7e8993;
+	border-color: #007cba;
-	box-shadow: 0 0 0 1px #7e8993;
+	box-shadow:
+		inset 0 2px 5px -3px #016087,
+		0 0 0 1px #007cba;
 }
 
 .wp-core-ui .button[disabled],
@@ -258,6 +268,7 @@ TABLE OF CONTENTS:
 	background: #00669b;
 	border-color: #00669b;
 	box-shadow: none;
+	color: #fff;
 }
 
 .wp-core-ui .button-primary[disabled],
@@ -307,10 +318,19 @@ TABLE OF CONTENTS:
 	z-index: 1;
 }
 
+/* pressed state e.g. a selected setting */
 .wp-core-ui .button-group > .button.active {
 	background-color: #e2e4e7;
-	box-shadow: inset 0 1px 0 0 #999;
+	color: #00669b;
 	border-color: #016087;
+	box-shadow: inset 0 2px 5px -3px #016087;
+}
+
+.wp-core-ui .button-group > .button.active:focus {
+	border-color: #007cba;
+	box-shadow:
+		inset 0 2px 5px -3px #016087,
+		0 0 0 1px #007cba;
 }
 
 /* ----------------------------------------------------------------------------