Index: src/wp-content/themes/twentynineteen/functions.php
===================================================================
--- src/wp-content/themes/twentynineteen/functions.php	(revision 45494)
+++ src/wp-content/themes/twentynineteen/functions.php	(working copy)
@@ -143,12 +143,12 @@
 			'editor-color-palette',
 			array(
 				array(
-					'name'  => __( 'Primary', 'twentynineteen' ),
+					'name'  => 'default' === get_theme_mod( 'primary_color' ) ? __( 'Blue', 'twentynineteen' ) : null,
 					'slug'  => 'primary',
 					'color' => twentynineteen_hsl_hex( 'default' === get_theme_mod( 'primary_color' ) ? 199 : get_theme_mod( 'primary_color_hue', 199 ), 100, 33 ),
 				),
 				array(
-					'name'  => __( 'Secondary', 'twentynineteen' ),
+					'name'  => 'default' === get_theme_mod( 'primary_color' ) ? __( 'Dark Blue', 'twentynineteen' ) : null,
 					'slug'  => 'secondary',
 					'color' => twentynineteen_hsl_hex( 'default' === get_theme_mod( 'primary_color' ) ? 199 : get_theme_mod( 'primary_color_hue', 199 ), 100, 23 ),
 				),