Examine source code of Abstract theme

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Abstract theme",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-042-ce07393efde7786b9dae05d4718b10e5.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(190, 245, 245)",
      "toolbar_text": "rgb(93, 76, 245)",
      "frame": "rgb(148, 249, 240)",
      "tab_background_text": "rgb(0, 43, 255)",
      "toolbar_field": "rgb(177, 226, 246)",
      "toolbar_field_text": "rgb(32, 0, 252)",
      "tab_line": "rgb(177, 226, 246)",
      "popup": "rgb(177, 226, 246)",
      "popup_text": "rgb(0, 43, 255)",
      "frame_inactive": "rgb(148, 209, 249)",
      "icons": "rgb(90, 77, 245)",
      "ntp_text": "rgb(51, 38, 209)",
      "popup_border": "rgb(77, 100, 245)",
      "tab_loading": "rgb(177, 226, 246)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{1476a77c-4e45-4d51-bb22-234ed83d0d56}"
    }
  }
}