Examine source code of Deep Dark Ocean

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Ocean Dark",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-019-7ce748211c61f9059493d4c4378e8a74.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(23, 46, 67)",
      "toolbar_text": "rgb(222, 184, 141)",
      "frame": "rgb(12, 25, 35)",
      "tab_background_text": "rgb(222, 184, 141)",
      "toolbar_field": "rgb(12, 25, 35)",
      "toolbar_field_text": "rgb(254, 228, 206)",
      "tab_line": "rgb(252, 160, 47)",
      "popup": "rgb(23, 46, 67)",
      "popup_text": "rgb(221, 183, 141)",
      "button_background_active": "rgb(83, 88, 90)",
      "button_background_hover": "rgb(56, 69, 80)",
      "frame_inactive": "rgb(12, 26, 36)",
      "icons_attention": "rgb(0, 202, 219)",
      "icons": "rgb(222, 184, 141)",
      "ntp_background": "rgb(12, 26, 36)",
      "ntp_text": "rgb(222, 184, 141)",
      "popup_border": "rgb(252, 160, 47)",
      "popup_highlight_text": "rgb(12, 25, 35)",
      "popup_highlight": "rgb(80, 163, 181)",
      "sidebar_border": "rgb(12, 26, 36)",
      "sidebar_highlight_text": "rgb(12, 25, 35)",
      "sidebar_highlight": "rgb(80, 163, 181)",
      "sidebar_text": "rgb(254, 228, 206)",
      "sidebar": "rgb(12, 25, 35)",
      "tab_background_separator": "rgb(12, 25, 35)",
      "tab_loading": "rgb(80, 163, 181)",
      "tab_selected": "rgb(23, 46, 67)",
      "tab_text": "rgb(169, 144, 115)",
      "toolbar_bottom_separator": "rgb(12, 25, 35)",
      "toolbar_field_border_focus": "rgb(252, 160, 47)",
      "toolbar_field_border": "rgb(12, 25, 35)",
      "toolbar_field_focus": "rgb(32, 66, 79)",
      "toolbar_field_highlight_text": "rgb(12, 25, 35)",
      "toolbar_field_highlight": "rgb(80, 163, 181)",
      "toolbar_field_separator": "rgb(23, 46, 67)",
      "toolbar_field_text_focus": "rgb(254, 228, 206)",
      "toolbar_top_separator": "rgb(23, 46, 67)",
      "toolbar_vertical_separator": "rgb(222, 184, 141)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{a2d4a3cb-33d8-4248-8446-4d3656ca6bfd}"
    }
  }
}