The areas you are quoting look to be related to themes. For example, the button color. Those can be customized in your Theme settings.
ACP > Customization > Themes > (Find the theme you want to modify) > (Click the Pencil icon).
There will be a tab for button color which will specify the color for the various buttons on the site. (Button Class will change Primary Button, Secondary Button, Normal Button so you should not need to set it, just pick the right button color in that section.)