Change button from isPrimary to isDefault and adjust color

plugins/woocommerce-admin/client/layout/store-alerts/index.js

@@ -152,7 +152,7 @@ class StoreAlerts extends Component {
 					}
 				>
 					<div className="woocommerce-store-alerts__message">{ alert.message }</div>
-					<Button isPrimary className="woocommerce-store-alerts__button" href={ alert.action.url }>
+					<Button isDefault className="woocommerce-store-alerts__button" href={ alert.action.url }>
 						{ alert.action.label }
 					</Button>
 				</Card>

plugins/woocommerce-admin/client/layout/store-alerts/style.scss

@@ -27,6 +27,10 @@
 		padding: 0;
 	}
 
+	a.components-button.is-button {
+		color: $core-grey-dark-500;
+	}
+
 	@include breakpoint( '<782px' ) {
 		padding: $gap;