Primary CSS, located in HubSpot's Design Manager, is a global stylesheet that is automatically applied to all HubSpot templates, unless otherwise removed from the template's head settings (Actions > Edit Head).
The purpose of the Primary CSS file is to give HubSpot users one centralized location for managing style declarations that are used across multiple content types and domains/sub-domains.
To locate your website's Primary CSS file:
- Navigate in HubSpot Marketing to Content > Design Manager > Primary CSS File.
- Here, you can make your desired edits. When you press Publish changes, your CSS is compiled into a minified CSS file called hs_default_custom_style.min.css that is attached to all of your pages.