Examine source code of Galactical

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Theme",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.png"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "center center"
      ],
      "additional_backgrounds_tiling": [
        "no-repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(40, 143, 197)",
      "toolbar_text": "rgb(147, 255, 0)",
      "frame": "rgb(51, 179, 255)",
      "tab_background_text": "rgb(230, 255, 182)",
      "toolbar_field": "rgb(127, 203, 208)",
      "toolbar_field_text": "rgb(0, 10, 255)",
      "tab_line": "rgb(197, 25, 194)",
      "popup": "rgb(0, 190, 25)",
      "popup_text": "rgb(74, 242, 255)",
      "tab_loading": "rgb(197, 25, 194)"
    }
  }
}