To edit the look and feel of your federation you can configure the following values:
Primary Color: will change the color and text color of the primary buttons (e.g. Login / OK / Save)
Secondary Color: will change the color and text color of the secondary buttons (e.g. Cancel / Back)
Background Color: will change the color of the top half of the background.
Logo: will change the logo that is displayed on the pages.
Once you defined your desired options click on save to enable the changes.
IMPORTANT: Changing the theme will not affect how the MySignicat application looks, it will affect all the screens that your users will see.