Examine source code of Ocean Clean

{
  "manifest_version": 2,
  "name": "Ocean Clean",
  "version": "1.0",
  "description": "a deep blue theme for a cleaner ocean",
  "browser_specific_settings": {
    "gecko": {
      "id": "oceanclean@mytheme",
      "strict_min_version": "68.0"
    }
  },
  "theme": {
    "colors": {
      "frame": "#041828",
      "frame_inactive": "#061e30",
      "tab_background_text": "#3a7898",
      "tab_selected": "#0c2a3e",
      "tab_line": "#00b8d4",
      "tab_loading": "#00b8d4",
      "tab_text": "#a0e0f0",
      "toolbar": "#082234",
      "toolbar_text": "#88d8ec",
      "toolbar_field": "#0c2a3e",
      "toolbar_field_text": "#a8ecf8",
      "toolbar_field_border": "#184858",
      "toolbar_field_focus": "#103244",
      "toolbar_field_text_focus": "#d0f8ff",
      "toolbar_field_border_focus": "#00b8d4",
      "toolbar_top_separator": "#020c14",
      "toolbar_bottom_separator": "#020c14",
      "toolbar_vertical_separator": "#0c2a3e",
      "icons": "#00a8c4",
      "icons_attention": "#00c8e4",
      "button_background_hover": "#103244",
      "button_background_active": "#184858",
      "popup": "#082234",
      "popup_text": "#88d8ec",
      "popup_border": "#184858",
      "popup_highlight": "#103244",
      "popup_highlight_text": "#d0f8ff",
      "sidebar": "#041828",
      "sidebar_text": "#4a8898",
      "sidebar_highlight": "#103244",
      "sidebar_highlight_text": "#d0f8ff",
      "sidebar_border": "#0c2a3e",
      "ntp_background": "#041828",
      "ntp_text": "#88d8ec"
    }
  },
  "icons": {
    "48": "icons/icon-48.png",
    "96": "icons/icon-96.png"
  }
}