Hey Mike -- What do you mean by brand colors? Are you planning to change your logo or edit the picture of your own logo? 

Hi @Heilpraktikerin Schulze-Pfau7 are you trying to import subscribers?

If yes, you can check this guide: How to Import a Subscriber List7

You will see an option to import a single subscriber or a CSV list. You can also try... (More)

Hi @floraluzca6 

There's no limit on adding a sending address to your Convertkit account. If you have further questions, I recommend you email help@convertkit.com2 to take a look at your account.

Thank you!