Examine source code of @sui5o Dim Theme

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Sui5o Dim Theme",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.jpg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "center top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgba(63, 63, 63, 0.46)",
      "toolbar_text": "rgb(255, 255, 255)",
      "frame": "rgb(0, 0, 0)",
      "tab_background_text": "rgb(255, 255, 255)",
      "toolbar_field": "rgba(0, 0, 0, 0.62)",
      "toolbar_field_text": "rgb(255, 255, 255)",
      "tab_line": "rgba(255, 255, 255, 0.66)",
      "popup": "rgba(47, 47, 47, 0.97)",
      "popup_text": "rgb(255, 255, 255)",
      "button_background_active": "rgba(111, 111, 111, 0.75)",
      "button_background_hover": "rgba(180, 180, 180, 0.5)",
      "icons": "rgb(255, 255, 255)",
      "ntp_background": "rgb(23, 23, 23)",
      "ntp_text": "rgba(255, 255, 255, 0.7)",
      "popup_border": "rgb(255, 255, 255)",
      "popup_highlight_text": "rgb(255, 255, 255)",
      "popup_highlight": "rgba(75, 75, 75, 0.8)",
      "tab_selected": "rgba(0, 0, 0, 0.5)",
      "tab_text": "rgb(255, 255, 255)",
      "toolbar_bottom_separator": "rgba(0, 0, 0, 0.65)",
      "toolbar_field_border_focus": "rgba(121, 121, 121, 0.5)",
      "toolbar_field_border": "rgba(0, 0, 0, 0.65)",
      "toolbar_field_focus": "rgba(19, 19, 19, 0.62)",
      "toolbar_field_highlight_text": "rgba(255, 255, 255, 0.88)",
      "toolbar_top_separator": "rgba(0, 0, 0, 0.5)",
      "tab_loading": "rgba(255, 255, 255, 0.66)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{f9896402-df01-44b3-96c5-6dd588cf7744}"
    }
  }
}