Examine source code of Tropical Dark

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Tropical Dark",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-002-609370e89a219e0548ac5ef6b4a7dd2e.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(31, 60, 35)",
      "toolbar_text": "rgb(188, 223, 196)",
      "frame": "rgb(6, 17, 9)",
      "tab_background_text": "rgb(188, 223, 196)",
      "toolbar_field": "rgb(6, 17, 9)",
      "toolbar_field_text": "rgb(188, 223, 196)",
      "tab_line": "rgba(121, 54, 232, 0)",
      "popup": "rgb(213, 255, 223)",
      "popup_text": "rgb(6, 17, 9)",
      "button_background_hover": "rgba(114, 255, 137, 0.2)",
      "icons": "rgb(201, 252, 212)",
      "ntp_background": "rgb(13, 25, 13)",
      "ntp_text": "rgb(188, 223, 196)",
      "popup_border": "rgba(28, 241, 86, 0.2)",
      "sidebar_text": "rgb(188, 223, 195)",
      "sidebar": "rgb(6, 17, 9)",
      "tab_loading": "rgb(206, 16, 103)",
      "tab_selected": "rgb(213, 255, 223)",
      "tab_text": "rgb(6, 17, 9)",
      "toolbar_field_border_focus": "rgb(227, 232, 54)",
      "toolbar_field_focus": "rgb(213, 255, 223)",
      "toolbar_field_highlight_text": "rgb(111, 111, 49)",
      "toolbar_field_highlight": "rgb(236, 242, 42)",
      "toolbar_field_text_focus": "rgb(6, 17, 9)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{3584eaf6-e808-456b-bfc4-4082948d4419}"
    }
  }
}