Examine source code of Grey Orange & lighter

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "FF 95 Grey & Orange",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.png"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "left top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(218, 218, 218)",
      "toolbar_text": "rgb(40, 40, 40)",
      "frame": "rgb(139, 139, 139)",
      "tab_background_text": "rgb(255, 255, 255)",
      "toolbar_field": "rgb(236, 236, 236)",
      "toolbar_field_text": "rgb(0, 0, 0)",
      "tab_line": "rgb(255, 90, 0)",
      "popup": "rgb(236, 236, 236)",
      "popup_text": "rgb(0, 0, 0)",
      "button_background_active": "rgb(139, 139, 139)",
      "button_background_hover": "rgb(139, 139, 139)",
      "tab_selected": "rgb(183, 183, 183)",
      "toolbar_field_border": "rgb(183, 183, 183)",
      "toolbar_top_separator": "rgb(236, 236, 236)",
      "tab_loading": "rgb(255, 90, 0)"
    }
  }
}