Examine source code of Clean Mountain Sunset

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Mountains",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.jpg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "right center"
      ],
      "additional_backgrounds_tiling": [
        "repeat-x"
      ]
    },
    "colors": {
      "toolbar": "rgb(23, 26, 27)",
      "toolbar_text": "rgb(248, 112, 140)",
      "frame": "rgb(14, 14, 16)",
      "tab_background_text": "rgb(23, 26, 27)",
      "toolbar_field": "rgb(208, 108, 109)",
      "toolbar_field_text": "rgb(23, 26, 27)",
      "tab_line": "rgb(248, 112, 140)",
      "popup": "rgb(208, 108, 109)",
      "popup_text": "rgb(23, 26, 27)",
      "sidebar_text": "rgb(208, 108, 109)",
      "tab_loading": "rgb(248, 112, 140)"
    }
  }
}