ComboStrap comes with:
- the standard Bootstrap stylesheet
- and the bootswatch themes
You can choose your stylesheet via the Bootstrap Stylesheet Version configuration.
Custom Bootstrap Theme
By creating your own Stylesheet
You can even create and install your custom stylesheet.
This is an advanced configuration and requires some programming skills but this is not out of reach. See ComboStrap Styling - How to create and add your own Bootstrap stylesheet
By using your own CSS variables
You can make use of bootstrap CSS variables to customize your stylesheet.