Examine source code of Cheems theme

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Cheems theme",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.jpg",
        "images/1.jpg",
        "images/2.jpg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "right top",
        "right top",
        "right top"
      ],
      "additional_backgrounds_tiling": [
        "repeat",
        "repeat",
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgba(167, 128, 50, 0.43)",
      "toolbar_text": "rgb(226, 174, 49)",
      "frame": "rgb(142, 14, 155)",
      "tab_background_text": "rgb(223, 188, 32)",
      "toolbar_field": "rgb(197, 153, 42)",
      "toolbar_field_text": "rgb(147, 110, 22)",
      "tab_line": "rgb(122, 87, 39)",
      "popup": "rgb(237, 193, 77)",
      "popup_text": "rgb(197, 153, 42)",
      "icons_attention": "rgb(141, 112, 34)",
      "icons": "rgb(176, 136, 97)",
      "tab_loading": "rgb(122, 87, 39)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{f37ec49a-78b5-481f-a6f0-e3f44bb35444}"
    }
  }
}