Examine source code of Colorbeams . One

{
  "manifest_version": 2,
  "version": "3.0",
  "name": "Colorbeams . One",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.jpg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "right top"
      ],
      "additional_backgrounds_tiling": [
        "no-repeat"
      ]
    },
    "colors": {
      "toolbar": "rgba(255, 255, 255, 0.05)",
      "toolbar_field": "rgba(0, 0, 0, 0.16)",
      "toolbar_field_text": "rgb(211, 211, 211)",
      "tab_line": "rgb(255, 186, 234)",
      "popup": "rgb(101, 101, 101)",
      "popup_text": "rgb(186, 215, 255)",
      "tab_loading": "rgb(255, 186, 234)",
      "bookmark_text": "rgb(186, 215, 255)",
      "frame": "rgb(68, 66, 67)",
      "tab_background_text": "rgb(186, 215, 255)"
    }
  }
}