Index: src/wp-admin/css/themes.css
===================================================================
--- src/wp-admin/css/themes.css	(revision 32496)
+++ src/wp-admin/css/themes.css	(working copy)
@@ -119,12 +119,12 @@
 }
 
 .theme-browser .theme .theme-actions .button-primary {
-	margin-right: 3px;
+	margin-left: 6px;
 }
 
 .theme-browser .theme .theme-actions .button-secondary {
 	float: none;
-	margin-left: 3px;
+	margin-right: 3px;
 }
 
 /**
Index: src/wp-admin/theme-install.php
===================================================================
--- src/wp-admin/theme-install.php	(revision 32496)
+++ src/wp-admin/theme-install.php	(working copy)
@@ -207,8 +207,8 @@
 	<h3 class="theme-name">{{ data.name }}</h3>
 
 	<div class="theme-actions">
-		<a class="button button-primary" href="{{ data.install_url }}"><?php esc_html_e( 'Install' ); ?></a>
-		<a class="button button-secondary preview install-theme-preview" href="#"><?php esc_html_e( 'Preview' ); ?></a>
+		<a class="button button-secondary" href="{{ data.install_url }}"><?php esc_html_e( 'Install' ); ?></a>
+		<a class="button button-primary preview install-theme-preview" href="#"><?php esc_html_e( 'Preview' ); ?></a>
 	</div>
 
 	<# if ( data.installed ) { #>