Examine source code of Ultra Modern Theme

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Ultra Modern Theme",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-026-829b05416f823e170310e7c826ad1bec.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(30, 26, 42)",
      "toolbar_text": "rgb(226, 219, 242)",
      "frame": "rgb(0, 0, 0)",
      "tab_background_text": "rgb(241, 237, 249)",
      "toolbar_field": "rgb(48, 41, 70)",
      "toolbar_field_text": "rgb(226, 219, 242)",
      "tab_line": "rgb(198, 76, 41)",
      "popup": "rgb(31, 34, 61)",
      "popup_text": "rgb(226, 219, 242)",
      "icons": "rgb(226, 219, 242)",
      "popup_border": "rgb(65, 29, 152)",
      "sidebar_border": "rgb(65, 29, 152)",
      "toolbar_field_border": "rgb(33, 25, 57)",
      "tab_loading": "rgb(198, 76, 41)"
    }
  }
}