By default, the platform does not have this option. You can use the following CSS code to change the Profile dropdown username text color.
Please follow the steps below:
1. Go to BuddyBoss > Theme Options
2. Under Custom Codes, enable CSS
3. Append the following:
.bb-template-v2 .site-header .user-wrap.menu-item-has-children .user-link .user-name { color: red; }
CSS
4. Save changes