Examine source code of Calm dark

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Calm dark",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-032-c7f80ac9e21af771c8d088973b1309ea.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(7, 50, 84)",
      "toolbar_text": "rgb(239, 244, 245)",
      "frame": "rgb(22, 33, 43)",
      "tab_background_text": "rgb(230, 236, 237)",
      "toolbar_field": "rgb(41, 85, 123)",
      "toolbar_field_text": "rgb(241, 241, 241)",
      "tab_line": "rgb(67, 194, 218)",
      "popup": "rgb(7, 50, 84)",
      "popup_text": "rgb(235, 243, 245)",
      "tab_loading": "rgb(205, 240, 39)"
    }
  }
}