By default, we do not have this option. You can use the following function code to change the text "You can now save time spent logging in by connecting your WordPress.com account to YOUSITEURL" if you are using JetPack. 

Please see the steps below:

Note: Make sure to have a complete site backup before proceeding

1. Go to Appearance > Theme Editor.

2. Under Select theme to edit, choose (BuddyBoss Child/whatever theme is active), then click Select.

3. Below Theme Files, select Theme Functions (functions.php).

4. Append the code just before the closing PHP tag “?>”:

function bb_jetpack_login_color() { ?>
    <style type="text/css">
        #loginform #jetpack-sso-wrap p {
            color:  white !important;
        }
    </style>
<?php }
add_action( 'login_enqueue_scripts', 'bb_jetpack_login_color' );

Note: Change white to your desired color

5. Click Update File to save the changes.

Note: Any modifications are considered as custom work already. Know more about our Support Policy here: https://www.buddyboss.com/support-policy/