Examine source code of Life in Colour

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Life in Colour",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.jpg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "right center"
      ],
      "additional_backgrounds_tiling": [
        "no-repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(27, 40, 45)",
      "toolbar_text": "rgb(0, 255, 48)",
      "frame": "rgb(0, 0, 0)",
      "tab_background_text": "rgb(41, 199, 71)",
      "toolbar_field": "rgb(0, 0, 0)",
      "toolbar_field_text": "rgb(0, 255, 47)",
      "tab_line": "rgb(41, 199, 71)",
      "popup": "rgb(27, 40, 45)",
      "popup_text": "rgb(51, 201, 78)",
      "tab_loading": "rgb(41, 199, 71)"
    }
  }
}