Examine source code of black/white/red

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "black/white/red",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.png"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "right center"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgba(13, 13, 3, 0.88)",
      "toolbar_text": "rgb(247, 247, 242)",
      "frame": "rgb(25, 24, 27)",
      "tab_background_text": "rgb(244, 236, 234)",
      "toolbar_field": "rgba(244, 244, 235, 0.96)",
      "toolbar_field_text": "rgb(240, 11, 11)",
      "tab_line": "rgb(243, 243, 238)",
      "popup": "rgb(231, 231, 237)",
      "popup_text": "rgb(243, 65, 17)",
      "tab_loading": "rgb(243, 243, 238)"
    }
  }
}