Examine source code of rainbow scene (animated)

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "rainbow scene theme",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.png"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "right top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(0, 0, 0)",
      "toolbar_text": "rgb(128, 255, 0)",
      "frame": "rgb(0, 0, 0)",
      "tab_background_text": "rgb(255, 255, 255)",
      "toolbar_field": "rgb(0, 0, 0)",
      "toolbar_field_text": "rgb(255, 255, 255)",
      "tab_line": "rgb(255, 0, 245)",
      "popup": "rgb(0, 0, 0)",
      "popup_text": "rgb(255, 0, 245)",
      "button_background_active": "rgb(0, 18, 195)",
      "button_background_hover": "rgb(134, 0, 230)",
      "icons_attention": "rgb(255, 155, 0)",
      "icons": "rgb(183, 0, 255)",
      "ntp_background": "rgb(0, 0, 0)",
      "ntp_text": "rgb(128, 255, 0)",
      "popup_border": "rgb(107, 255, 0)",
      "popup_highlight_text": "rgb(252, 255, 0)",
      "popup_highlight": "rgb(89, 0, 227)",
      "sidebar_border": "rgb(128, 255, 0)",
      "sidebar_highlight_text": "rgb(252, 255, 0)",
      "sidebar_highlight": "rgb(89, 0, 227)",
      "sidebar_text": "rgb(0, 252, 255)",
      "sidebar": "rgb(0, 0, 0)",
      "tab_background_separator": "rgb(0, 0, 0)",
      "tab_loading": "rgb(128, 255, 0)",
      "tab_text": "rgb(255, 255, 255)",
      "toolbar_bottom_separator": "rgb(0, 0, 0)",
      "toolbar_field_border_focus": "rgb(255, 123, 0)",
      "toolbar_field_border": "rgb(0, 0, 0)",
      "toolbar_field_highlight_text": "rgb(148, 255, 0)",
      "toolbar_field_highlight": "rgb(105, 0, 199)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{90b2bf3c-0b38-446b-83f0-21a31ff159e3}"
    }
  }
}