When applying an existing composed look to an existing SharePoint site, it is important to note that the only method available for applying the composed look as it exists in the
_catalogs/design list is with the SharePoint web interface. To apply the components of a composed look with PowerShell or .NET code, each property must be specified individually. In this recipe, we will use the SharePoint web interface to apply a composed look as well as use PowerShell and .NET code to apply the components of a composed look.
From PowerShell or .NET code, the individual properties of the list item representing the composed look could be used when applying the individual components.
Follow these steps to apply