Examine source code of Navy Metal

{
  "name": "Navy Metal",
  "author": "Pedro Torcatt",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "colors": {
      "frame": "#233237",
      "frame_inactive": "#18121E",
      "tab_text": "rgba(170, 170, 170, 1)",
      "tab_background_text": "rgba(170, 170, 170, 1)",
      "tab_line": "#0B3C5D",
      "tab_loading": "#984B43",
      "toolbar": "#1D2731",
      "toolbar_top_separator": "#0B3C5D",
      "toolbar_bottom_separator": "#0B3C5D",
      "toolbar_vertical_separator": "#0B3C5D",
      "toolbar_field": "#0b3c5d",
      "toolbar_field_text": "rgba(170, 170, 170, 1)",
      "toolbar_field_border": "#0B3C5D",
      "toolbar_field_separator": "#0B3C5D",
      "toolbar_field_focus": "#062f4f",
      "toolbar_field_border_focus": "#0b3c5d",
      "button_background_hover": "#0b3c5d",
      "button_background_active": "#062f4f",
      "bookmark_text": "rgba(170, 170, 170, 1)",
      "popup": "#1D2731",
      "popup_text": "rgba(170, 170, 170, 1)",
      "popup_border": "#0B3C5D",
      "popup_highlight": "#21252B",
      "popup_highlight_text": "rgba(255, 255, 255, 1)",
      "ntp_background": "#1D2731",
      "ntp_text": "rgba(170, 170, 170, 1)",
      "sidebar": "#1D2731",
      "sidebar_text": "rgba(170, 170, 170, 1)",
      "sidebar_border": "rgba(18, 18, 18, 1)",
      "sidebar_highlight": "#21252B",
      "sidebar_highlight_text": "rgba(255, 255, 255, 1)"
    }
  }
}