Index: src/wp-admin/includes/misc.php
===================================================================
--- src/wp-admin/includes/misc.php	(revision 26608)
+++ src/wp-admin/includes/misc.php	(working copy)
@@ -583,11 +583,19 @@
 		<?php
 
 		foreach ( $_wp_admin_css_colors as $color => $color_info ) :
-
+			$url = $color_info->url;
+			$suffix = '.min.css';
+			if ( defined( 'SCRIPT_DEBUG' ) && SCRIPT_DEBUG ) {
+				$url = preg_replace( '/.min.css$|.min.css(?=\?)/', '.css', $url );
+				$suffix = '.css';
+			}
+			if ( is_rtl() ) {
+				$url = str_replace( $suffix, '-rtl' . $suffix, $url );
+			}
 			?>
 			<div class="color-option <?php echo ( $color == $current_color ) ? 'selected' : ''; ?>">
 				<input name="admin_color" id="admin_color_<?php echo esc_attr( $color ); ?>" type="radio" value="<?php echo esc_attr( $color ); ?>" class="tog" <?php checked( $color, $current_color ); ?> />
-				<input type="hidden" class="css_url" value="<?php echo esc_url( $color_info->url ); ?>" />
+				<input type="hidden" class="css_url" value="<?php echo esc_url( $url ); ?>" />
 				<input type="hidden" class="icon_colors" value="<?php echo esc_attr( json_encode( array( 'icons' => $color_info->icon_colors ) ) ); ?>" />
 				<label for="admin_color_<?php echo esc_attr( $color ); ?>"><?php echo esc_html( $color_info->name ); ?></label>
 				<table class="color-palette">
Index: src/wp-includes/class.wp-styles.php
===================================================================
--- src/wp-includes/class.wp-styles.php	(revision 26608)
+++ src/wp-includes/class.wp-styles.php	(working copy)
@@ -65,6 +65,8 @@
 		$rel = isset($obj->extra['alt']) && $obj->extra['alt'] ? 'alternate stylesheet' : 'stylesheet';
 		$title = isset($obj->extra['title']) ? "title='" . esc_attr( $obj->extra['title'] ) . "'" : '';
 
+if ( 'colors' === $handle ) var_dump( $obj, $href );
+
 		$tag = apply_filters( 'style_loader_tag', "<link rel='$rel' id='$handle-css' $title href='$href' type='text/css' media='$media' />\n", $handle );
 		if ( 'rtl' === $this->text_direction && isset($obj->extra['rtl']) && $obj->extra['rtl'] ) {
 			if ( is_bool( $obj->extra['rtl'] ) || 'replace' === $obj->extra['rtl'] ) {
@@ -82,7 +84,7 @@
 				$tag .= $rtl_tag;
 			}
 		}
-
+if ( 'colors' === $handle ) var_dump( $rtl_href );
 		if ( isset($obj->extra['conditional']) && $obj->extra['conditional'] ) {
 			$tag = "<!--[if {$obj->extra['conditional']}]>\n" . $tag . "<![endif]-->\n";
 		}