Examine source code of SlateDarkPro

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "SlateDarkPro",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-000-5672c42860d5b06e1058dc477397f3ef.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(26, 53, 91)",
      "toolbar_text": "rgb(135, 158, 181)",
      "frame": "rgb(9, 26, 50)",
      "tab_background_text": "rgb(135, 158, 181)",
      "toolbar_field": "rgb(32, 33, 37)",
      "toolbar_field_text": "rgb(234, 234, 234)",
      "tab_line": "rgba(255, 255, 255, 0)",
      "popup": "rgb(26, 53, 91)",
      "popup_text": "rgb(255, 255, 255)",
      "button_background_active": "rgb(48, 81, 127)",
      "button_background_hover": "rgb(9, 26, 50)",
      "tab_text": "rgb(255, 255, 255)",
      "toolbar_field_border_focus": "rgb(36, 82, 149)",
      "toolbar_field_focus": "rgb(9, 26, 50)",
      "toolbar_field_highlight": "rgb(36, 82, 149)",
      "tab_loading": "rgba(255, 255, 255, 0)"
    }
  }
}