Examine source code of blue black

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "blue black",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-036-40a272fe657f748396e017c7a64ee2dc.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(0, 0, 10)",
      "toolbar_text": "rgb(255, 255, 255)",
      "frame": "rgb(139, 139, 139)",
      "tab_background_text": "rgb(80, 80, 80)",
      "toolbar_field": "rgba(178, 178, 237, 0.36)",
      "toolbar_field_text": "rgb(117, 111, 164)",
      "tab_line": "rgb(159, 155, 198)",
      "popup": "rgb(251, 251, 251)",
      "popup_text": "rgb(0, 0, 100)",
      "tab_loading": "rgb(159, 155, 198)"
    }
  }
}