Examine source code of Gallifreyan blue theme

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Gallifreyan blue theme",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.jpg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "center center"
      ],
      "additional_backgrounds_tiling": [
        "repeat-x"
      ]
    },
    "colors": {
      "toolbar": "rgba(13, 36, 68, 0)",
      "toolbar_text": "rgb(143, 170, 249)",
      "frame": "rgb(0, 56, 101)",
      "tab_background_text": "rgb(90, 126, 216)",
      "toolbar_field": "rgba(87, 87, 122, 0.36)",
      "toolbar_field_text": "rgb(142, 160, 255)",
      "tab_line": "rgb(103, 101, 255)",
      "popup": "rgb(14, 13, 68)",
      "popup_text": "rgb(120, 156, 246)",
      "ntp_background": "rgb(0, 12, 51)",
      "ntp_text": "rgb(120, 156, 246)",
      "tab_loading": "rgb(103, 101, 255)"
    }
  }
}