Examine source code of Calm lofi dark theme

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Calm lofi dark theme",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.png"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "right top"
      ],
      "additional_backgrounds_tiling": [
        "no-repeat"
      ]
    },
    "colors": {
      "toolbar": "rgba(15, 15, 15, 0.81)",
      "toolbar_text": "rgb(224, 250, 237)",
      "frame": "rgb(18, 18, 32)",
      "tab_background_text": "rgb(177, 202, 234)",
      "toolbar_field": "rgb(26, 27, 38)",
      "toolbar_field_text": "rgb(255, 255, 255)",
      "tab_line": "rgb(209, 182, 239)",
      "popup": "rgb(31, 34, 61)",
      "popup_text": "rgb(215, 226, 239)",
      "tab_loading": "rgb(209, 182, 239)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{e5ddc591-3006-40a9-a67e-fab9e2d0bbf2}"
    }
  }
}