All the colors of your campaign (backgrounds, borders, buttons) are a part of the Style. You can change these colors in the style editor.
These changes will be applied to any campaign that is using this style. You have the option to create a new, custom style.
|Flat||This creates a square button.|
|Pill||This creates a rounded button|
|Chunky||This creates a square button with a shadow, so it has a bit of dimension to the look.|