If you would like to change your name, adjust the look and feel of your account, and take myriad other actions to personally customize Dart, you can do so from your account.
To access your account settings, click on your personal icon at the top left of your screen to reveal the Account option:
Once on your account page, you can:
Change your name/profile picture
Change your password
Change the color of your icon
Choose between light or dark mode
Decide when your week starts
etc.