Extending themes
A theme can extend another theme using the extends key.
If the value is default, it resolves to the built-in default theme. Otherwise the value of extends is a relative path from the current theme file to the theme being extended. If a theme doesn't have an extends key, default PDF2 plug-in styles are used.
base.yaml
brand:
primary-color: orange
page:
size: A4product/theme.yaml
extends: ../base.yaml
page:
size: Letter
style:
topic:
color: $brand-primary-color