Sometimes grey/gray text

Sometimes when I make an item it shows up with grey (gray) text. Doesn’t seem to be a clear reason for this and it happens on both mac and iPad/ iPhone.
Is there a setting that I am activating sometimes by mistake? It doesn’t seem to matter whether there is a project or context. It appears random, I am sure it’s not. Can’t find it in the manual. Any help appreciated.

Items show up gray for me when:

  1. The corresponding project is “On Hold”
  2. There is a “defer date” set

Ah brilliant! Thanks for that. Should have worked it out for myself. Thank you.