updated theme Twenty Nineteen version 3.3

wp-content/themes/twentynineteen/js/customize-controls.js

@@ -20,7 +20,8 @@
 						control.container.slideUp( 180 );
 					}
 				};
-
+				// The control-specific label is redundant because, visually, this control is part of the Color Scheme control.
+				control.container.find( '.customize-control-title:first' ).addClass( 'screen-reader-text' );
 				visibility();
 				setting.bind( visibility );
 			});