Examine source code of Dark Basic

{
  "manifest_version": 2,
  "version": "1.1",
  "name": "Dark Basic",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.png"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "left top"
      ],
      "additional_backgrounds_tiling": [
        "repeat-x"
      ]
    },
    "colors": {
      "toolbar": "rgb(50, 50, 52)",
      "toolbar_text": "rgb(255, 255, 255)",
      "frame": "rgb(151, 179, 207)",
      "tab_background_text": "rgb(0, 0, 0)",
      "toolbar_field": "rgb(71, 71, 73)",
      "toolbar_field_text": "rgb(255, 255, 255)",
      "tab_line": "rgb(50, 50, 52)",
      "popup": "rgb(50, 50, 52)",
      "popup_text": "rgb(255, 255, 255)",
      "ntp_background": "rgb(39, 39, 41)",
      "ntp_text": "rgb(255, 255, 255)",
      "sidebar_border": "rgb(26, 26, 26)",
      "sidebar_text": "rgb(255, 255, 255)",
      "sidebar": "rgb(39, 39, 41)",
      "tab_loading": "rgb(50, 50, 52)"
    }
  }
}