Examine source code of Cool cool theme

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Cool",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-022-0e8aa16bfcfce2449791412d89f3a92b.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgba(38, 205, 235, 0.77)",
      "toolbar_text": "rgb(181, 27, 177)",
      "frame": "rgb(97, 234, 229)",
      "tab_background_text": "rgb(82, 24, 239)",
      "toolbar_field": "rgba(255, 255, 255, 0.21)",
      "toolbar_field_text": "rgb(221, 8, 175)",
      "tab_line": "rgb(255, 255, 255)",
      "popup": "rgb(255, 255, 255)",
      "popup_text": "rgb(0, 15, 1)",
      "tab_loading": "rgb(255, 255, 255)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{a0a3acd9-15f6-4ac4-aaab-504a754cc7de}"
    }
  }
}