Examine source code of Thème Artivain

{
  "manifest_version": 2,
  "version": "2.0",
  "name": "Artivain",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/pattern.svg",
        "images/logo.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "right top",
        "right top"
      ],
      "additional_backgrounds_tiling": [
        "no-repeat",
        "no-repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(30, 40, 42)",
      "toolbar_text": "rgb(255, 255, 255)",
      "frame": "rgb(20, 22, 23)",
      "tab_background_text": "rgb(139, 150, 152)",
      "toolbar_field": "rgb(20, 22, 23)",
      "toolbar_field_text": "rgb(139, 150, 152)",
      "tab_line": "rgb(6, 71, 109)",
      "popup": "rgb(30, 40, 42)",
      "popup_text": "rgb(255, 255, 255)",
      "button_background_active": "rgb(6, 71, 109)",
      "sidebar_border": "rgb(20, 22, 23)",
      "sidebar_highlight": "rgb(6, 71, 109)",
      "sidebar": "rgb(30, 40, 42)",
      "tab_selected": "rgb(6, 71, 109)",
      "tab_text": "rgb(255, 255, 255)",
      "toolbar_bottom_separator": "rgb(30, 40, 42)",
      "toolbar_field_border_focus": "rgb(6, 71, 109)",
      "toolbar_field_focus": "rgb(6, 71, 109)",
      "toolbar_field_highlight_text": "rgb(255, 255, 255)",
      "toolbar_field_highlight": "rgb(129, 215, 66)",
      "toolbar_field_text_focus": "rgb(255, 255, 255)",
      "toolbar_top_separator": "rgb(30, 40, 42)",
      "tab_loading": "rgb(6, 71, 109)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{3ce5672a-dfe6-4161-a20e-4b656d2ca1d4}"
    }
  }
}