Examine source code of Minimalistic Sunset

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Sunset Behind The Mountains",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.jpg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "right center"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgba(219, 220, 219, 0)",
      "toolbar_text": "rgb(255, 255, 255)",
      "frame": "rgb(201, 197, 197)",
      "tab_background_text": "rgb(255, 255, 255)",
      "toolbar_field": "rgba(255, 255, 255, 0)",
      "toolbar_field_text": "rgb(255, 255, 255)",
      "tab_line": "rgb(245, 75, 41)",
      "popup": "rgba(0, 0, 0, 0.75)",
      "popup_text": "rgb(245, 78, 41)",
      "button_background_hover": "rgba(245, 75, 41, 0.5)",
      "tab_loading": "rgb(245, 75, 41)"
    }
  }
}