How to use ‘Set Style’ in’s online tools ‘Create Custom Link’ to change ‘fillColor’?

I am using the online tool of Create Custom Link to change a normal object such as a square’s fillColor. Where

  1. Action for Cell(s): Set Style; Key: fillcolor; Value: #ffe6cc
  2. Tags:ss
    push the Add Action button, you can get the code in Custom Link:
  "actions": (
      "style": {
        "tags": (
        "key": "#ffe6cc"

But this one do not work.