I tried copying the seven theme from /core/theme into my own /theme folder. I renamed all the files that starts with seven to sevenx and also renamed the seven_ functions to sevenx_ and it still not showing up on the theme pages.

  • What else do I need to change to make drupal 8 see this new cloned theme?
  • Is there a quick tool to get this done without having me to rename everything?

1 Answer 1


A few things that could have been missed -

Cache clear, Changing the name of the theme in .info.yml of the new theme, Not putting the base theme in the .info.yml.

If none of those work, this is a pretty good guide. https://www.drupal.org/theme-guide/8/creating-a-sub-theme

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