Make sure theme color palette presets are output when appearance tool…

…s are enabled. (#57190)

* Make sure theme color palette preset styles are output.

* Check for color palette support

* Also check for border support.

lib/global-styles-and-settings.php

@@ -72,7 +72,13 @@ function gutenberg_get_global_stylesheet( $types = array() ) {
 		 * @see wp_add_global_styles_for_blocks
 		 */
 		$origins = array( 'default', 'theme', 'custom' );
-		if ( ! $supports_theme_json ) {
+		/*
+		* If the theme doesn't have theme.json but supports both appearance tools and color palette,
+		* the 'theme' origin should be included so color palette presets are also output.
+		*/
+		if ( ! $supports_theme_json && ( current_theme_supports( 'appearance-tools' ) || current_theme_supports( 'border' ) ) && current_theme_supports( 'editor-color-palette' ) ) {
+			$origins = array( 'default', 'theme' );
+		} elseif ( ! $supports_theme_json ) {
 			$origins = array( 'default' );
 		}
 		$styles_rest = $tree->get_stylesheet( $types, $origins );