Examine source code of Simple Mellow

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Simple Mellow",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.jpg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "left center"
      ],
      "additional_backgrounds_tiling": [
        "no-repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(0, 68, 107)",
      "toolbar_text": "rgb(248, 112, 140)",
      "frame": "rgb(255, 145, 146)",
      "tab_background_text": "rgb(3, 101, 152)",
      "toolbar_field": "rgb(0, 44, 90)",
      "toolbar_field_text": "rgb(0, 102, 162)",
      "tab_line": "rgb(248, 112, 140)",
      "popup": "rgb(0, 86, 136)",
      "popup_text": "rgb(248, 112, 140)",
      "button_background_hover": "rgb(5, 98, 90)",
      "tab_loading": "rgb(248, 112, 140)"
    }
  }
}