Examine source code of Metallic Sunset

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Metallic Sunset",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.png"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "center center"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(101, 35, 92)",
      "toolbar_text": "rgb(253, 255, 198)",
      "frame": "rgb(142, 179, 201)",
      "tab_background_text": "rgb(255, 255, 255)",
      "toolbar_field": "rgb(255, 162, 103)",
      "toolbar_field_text": "rgb(253, 255, 198)",
      "tab_line": "rgb(248, 112, 112)",
      "popup": "rgb(101, 35, 92)",
      "popup_text": "rgb(255, 162, 103)",
      "button_background_active": "rgb(170, 56, 85)",
      "button_background_hover": "rgb(170, 56, 163)",
      "ntp_background": "rgb(125, 28, 53)",
      "sidebar_border": "rgb(255, 175, 89)",
      "sidebar_highlight_text": "rgb(255, 248, 201)",
      "sidebar_text": "rgb(231, 163, 255)",
      "sidebar": "rgb(123, 39, 63)",
      "tab_loading": "rgb(168, 105, 255)",
      "toolbar_bottom_separator": "rgb(225, 105, 255)",
      "toolbar_field_border_focus": "rgb(255, 105, 168)",
      "toolbar_field_highlight": "rgb(255, 101, 190)",
      "toolbar_field_text_focus": "rgb(255, 246, 180)",
      "toolbar_top_separator": "rgb(248, 112, 112)"
    }
  }
}