Examine source code of Dark Collage

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "collage theme",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.png"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "right top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(44, 46, 46)",
      "toolbar_text": "rgb(252, 252, 252)",
      "frame": "rgb(23, 38, 66)",
      "tab_background_text": "rgb(214, 219, 233)",
      "toolbar_field": "rgb(255, 255, 255)",
      "toolbar_field_text": "rgb(0, 0, 0)",
      "tab_line": "rgb(99, 100, 103)",
      "popup": "rgb(55, 55, 56)",
      "popup_text": "rgb(213, 213, 224)",
      "tab_loading": "rgb(99, 100, 103)"
    }
  }
}