add two colors

src/client/styles/scss/theme/spring.scss

@@ -35,6 +35,8 @@
 
 $themecolor: #ffb8c6;
 $themelight: #fff0f5;
+$subthemecolor: #67a856;
+$third-main-color: antiquewhite;
 $accentcolor: #e08dbc;
 
 .grw-navbar {