Examine source code of Black Red Theme

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "123",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-012-1e971c5fbb8dec3acbd76dd6c6819de9.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(37, 37, 51)",
      "toolbar_text": "rgb(222, 25, 25)",
      "frame": "rgb(0, 0, 0)",
      "tab_background_text": "rgb(186, 51, 115)",
      "toolbar_field": "rgb(6, 7, 7)",
      "toolbar_field_text": "rgb(3, 255, 95)",
      "tab_line": "rgb(39, 225, 29)",
      "popup": "rgb(7, 8, 9)",
      "popup_text": "rgb(255, 17, 17)",
      "tab_loading": "rgb(39, 225, 29)"
    }
  }
}