Create a global attribute

global-attribute.json

{
  "data": [
    {
      "slug": "product-color",
      "label": "Product color",
      "options": [
        {
          "label": "Red",
          "slug": "red",
          "description": "Red is a very beautiful color for every product."
        },
        {
          "label": "Blue",
          "slug": "blue",
          "description": "I am blue - dabadi badibai"
        },
        {
          "label": "Green",
          "slug": "green",
          "description": "Green - like hope, you know?"
        }
      ]
    },
    (...)
  ],
  "shop": "demo-shop"
}