Examine source code of Deep Purple (Grey)

{
  "manifest_version": 2,
  "version": "1.0.2",
  "name": "Deep Purple (Grey)",
  "description": "A Deep Purple theme with a grey accent colour.",
  "theme": {
    "colors": {
      "button_background_active": "rgba(255, 255, 255, 0.2)",
      "button_background_hover": "rgba(255, 255, 255, 0.1)",
      "frame": "rgb(15, 11, 12)",
      "icons": "rgb(130, 160, 160)",
      "icons_attention": "rgb(255, 255, 255)",
      "sidebar": "rgb(15, 11, 12)",
      "sidebar_border": "rgb(45, 37, 39)",
      "sidebar_highlight": "rgba(255, 255, 255, 0.3)",
      "sidebar_highlight_text": "rgb(255, 255, 255)",
      "sidebar_text": "rgb(209, 190, 190)",
      "tab_background_text": "rgb(201, 190, 190)",
      "tab_line": "rgb(130, 160, 160)",
      "tab_loading": "rgb(130, 160, 160)",
      "tab_text": "rgb(253, 162, 56)",
      "toolbar": "rgb(43, 41, 58)",
      "toolbar_field": "rgb(15, 11, 12)",
      "toolbar_field_text": "rgb(201, 190, 190)",
      "toolbar_text": "rgb(201, 190, 190)"
    },
    "properties": {
      "color_scheme": "dark"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{05d5033c-25a0-4693-829a-3293dc672018}"
    }
  }
}