Zend certified PHP/Magento developer

Attach Excel cell styles to theme file

If I create a new workbook not from a template and then go Page Layout > Themes > select the custom theme I want, it updates the colours and font but does not update the ‘Styles’ gallery on the Home tab.

I have access to a template that has in-house styles as well, but wondering if there’s a way to embed the custom cell styles in the theme so that choosing a theme also updates the cell styles, and can then start from any blank workbook rather than needing the template.

Is that possible?