Examine source code of Twitch Theme

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Twitch Theme",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.png"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "left center"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(40, 25, 70)",
      "toolbar_text": "rgb(255, 255, 255)",
      "frame": "rgb(29, 19, 41)",
      "tab_background_text": "rgb(196, 177, 236)",
      "toolbar_field": "rgb(66, 55, 90)",
      "toolbar_field_text": "rgb(255, 255, 255)",
      "tab_line": "rgb(138, 98, 221)",
      "popup": "rgb(35, 26, 53)",
      "popup_text": "rgb(215, 226, 239)",
      "tab_loading": "rgb(138, 98, 221)"
    }
  }
}